AM I IN LOVE????!!!???

Well i have been with this guy(Rex) for 3 MONTHS! Before Rex i went out with a guy for over a year! I thought it was the real thing but i broke it off because i never got to see him and it was kindof pointless. Plus at the time i began falling for Rex. Now that i am with rex everything is diffrent then it was withthe guy before him. I feel really happy and eventhough it only been 3 months it feels so much longer. I know rex feels the same way and i can't stand to be away from him. But i don't want to get too attatched if i don't think he is one. I want to make sure i am in love before i go any further in our relationship. I tell myself i am but a small part of me questions as if its just making sure or soemtihing...what do u think?

If you have to ask...probably not.