I like him but then I don't ?

I like this guy,but the I like another, but i'm still not over the last guy I was with. This other guy likes me but I don't know how to put him down,his friend gets on my ass and i feel like shit when he does.
Well with one of the guys i like i shall call him (TOMMY) and with the other I shall call him (PENNY).
well tommy goes to my school,but I don't really know his name and he is in the 9th grade and im in the 10th but im going to be 17 really soon. I want to talk to this guy but i cant find the balls to go up to him,but he is always with his friends,so its like damn.and I know he see's me cause we always make eye contact going to class,i want to smile but I can't.
Well with penny,we have a past and im going to see him in 2 weeks and it like idk how to act aorund him with our friend because she knows I like him,but he doesn't know I still like him. And i know he would only go out with me for my body,but still i want to go out with him .
Well with the last guy i was with he has my heart and i feel like he always will in a way,he is and will always be my first love and i hate it,he tells me he just wants to be friends but he isn't even trying and I am . When i try to get with a guy or get close to one i can't because he is always on my mind and it like a bug, HE is the one drug i can't get away form.and I really hate it. I know that some thing is going on with him and he doesn't want to and it get all confusing.
And for the guy that likes me and i dont like him,i dont know how to tell him,and i haven't talked to him for a really long time. I told him i dont want a BF but that is a lie.
I dont know what to do,i need help.

Okay this is very confusing but i'll do my best. i'm assuming the guy you don't like hasn't had his name mentioned..? but tell him the truth. for his benefit- say you like another boy and you can't force yourself to like him, so his friend should get off your back.

Penny only wants you for your body? if that's the case, have nothing to do with him. you know you can do better, don't stoop so low as to go back out with him.

Tommy- you don't actually know his name? then how can you LIKE him? i think it's lust.

and for the fourth guy (jesus is there actually a 4th or am i just making crap up?) that was your first love. if he wants to be friends but is making no effort, is he really worth it, have a talk with him and see what he says.

I think that you need to tell the guy that likese you the truth and as for the guy that would only date you for your body, don't even waste your time. It is not worth it. And the guy that has your heart I think that you need to sit him down and tell him how you really feel, that is the only way to make things better, don't just ignore it. It will only make things worse

UPDATE:
"tommy" i know his name now, just now i'm to shy to say hi or smile when he look's at me,i would ask my friend to ask him whats up,because i know i would never get the balls to go up to him myself, I can't even say hi to my friend that i talk to on line. (he goes to my school)
with "penny" fuck it, im going to get my ass laid by him and throw him away like he did with me. All fun and games right?
well, with the guy that likes me and i don't like i haven't talked to him in a long time because i haven't been on AIM or myspace,so its really hard.
And for the guy who has my heart,I would try to talk to him ,but what is the point I mean,if i text him he will be like "Who is this" and its like why even try anymore. with him with anyone with my life. It's so hard for me to get over him,even though im trying hard. I don't know if he wants to be my friends and i haven't talked to my friend that knows him to ask him . So its all confusing..
But than k you with the help,keep it coming ?