Needs advice quick!

Alright, I have an issue and need some advice :P Ok, over a year and a half ago I was in a rather unpleasant relationship. Without going into a lot of old history that's better left alone lets just say that things happened, he cheated on me and then dumped me for that girl and then moved to a different state with her. I was pissed, hurt and confused over all of it of course but I tried to be happy for them and stay away from them but the girl really hated me because for some reason she still viewed me as a threat to her new relationship and on and on, things got nasty and I started getting physical treats from her and it went down hill from there. Ok, thats the background of my current problem :P

Now, I've been dating a fantastic man for the last 11 months *yesterday was our 11 month anniversary! :D* and we're engaged to be married next year. He's very protective of me and has absolutely no tolerance for anyone thats hurt me. He knows my ex's and my history and he's actually talked to my ex because I finally got feed up and decided to let him help me and let him take care of getting my ex and his girlfriend to leave me alone so he really strongly dislikes my ex, and he has a right to but thats where the problem arises. My fiance has been out of the state and is coming up within the month and my ex has just moved back to this area. This is a small town and it's very hard not to run into people whether you want to or not and I really don't want them meeting each other since it really wouldn't be good. I haven't told my fiance that my ex is back in the area yet since that will just get him pissed off and he'll demand that he wants to meet him and "have a talk with him" *yeah right* so thats where the problem is. I hate not telling him everything since we never hide things from each other but I really don't want to tell him that my ex is in the area. So should I tell him and try to get him not to do anything about it, not tell him and just hope that they don't meet and tell him after we leave again next month *since we're going back to where he's been* or what the heck do I do? Everyone just tells me not to tell him about it but I hate doing that because when he asks whats going on I feel like I'm lying to him not telling him. I have no idea what to do! Please, a little advice would be fantastic and hearing other peoples takes on things always helps me. Thank you

Um.. When people tell you not to tell him please DO tell him because it's for your own saftey if anything drastic happens you want him to be there for you to support you through it all. Please tell him otherwise things could hoenstly get very ugly and also i dislike your ex and his girlfriend and Id ont even know them I know it's quick to judge but he sounds like a....( can't say it )
but yeah please tell him that your ex is in the area hun :)
Mwahh also if you don't like "lying" to him then not telling him about your ex bein gin the area isn't going to help at all you soon will slip. Don't ruin anything for yourself sweetie,
xxxxxx

Tell him. itll give him time to brace himself so if you two see him out and about he wont have such a temper because he'll of had time to think about actions and consequences. plus if he finds out you knew and didnt tell him. that could cause a fight if he feels like you are hiding things from him. and as far as the girl goes, if you get threats from her and its concerning to you, especially now that she's in your town, tell the authorities. you have a "hometown advantage" in you know the people around there, they know the history with you and your ex and no proper authority would ignore a physical threat.

How is preparing him that he is in town and that its very likely that they will see eachother drama??

Thank you everyone for all your input, it helped a lot. I see what people mean by both sides. *laughs* No, I can safely say that it doesn't make me feel good or anything like that to see guys fight over me at all but the reason I'm making a big deal of this as was said is because...well my fiance is the take action and not really care about the effects afterwards on topics like these. Knowing him like I do his reaction if I let him find out on his own once he's here will be much worse then if I had told him because 1. he'll be mad that I didn't tell him and 2. he won't give himself time to cool down and think things through.

The reason I seem to know so much about what my ex does is because its a small town and the people sink their teeth into anything new and also everyone hasn't gotten it through their heads that I don't care what he does and I don't need or want them to tell me everything they hear or are told no matter how much I tell them I don't want to know. Anyway, maybe I am making too much of this just it concerns me for my fiance's sake, a lot can happen in a month and I don't want him getting into any trouble :P

"then moved to a different state with her"

If they live in a different state how did this come about?

"I tried to be happy for them and stay away from them but the girl really hated me because for some reason she still viewed me as a threat to her new relationship and on and on, things got nasty and I started getting physical threats from her"

If you don't care about them, neither should your bf. If they phone you hang up, if it continues change your number, if that doesn't work call the cops. You only have a month to go, ignore it and continue on with your life.