P.S the last thing i would want is a breakup?

Okay idk where to really start... I think i'll just name the things that really grind my gears... Uhmm My boyfriend gives me attention just there feels like there is something missing because i can have these amazing days with him where I'm head over heals and everything is worth it And then the very next day i'll be thinking.. Wow we really don't see eye to eye on almost anything.. And gAH I'm so angry!!! Biggest problem I have... Is over looking his past Because it is really hard to do so when i dont even have one.. He was my first for well pretty much everything other then kissing and still kissing my others was very mild... Well I'm his eh not even close to being first and though he says I'm the only girl he has had these kind of feelings for and how different things are with me. I cant help but to think about his past.. All the other girls he told he loved whether or not he ment it or not... the other girls he's shared that type of closeness i considered a very big deal to share with him... And i know stories about him with other girls.. And it makes me sick to think about him seeing or pleasuring someone else the way he does to me. Okay AND he still talks to his ex the other that LOVED him and he had cheated on her and she still wanted to be with him and they had stopped fooling around 2 months before we started going out.. And they still talk like every week he gets off the phone with me to talk to her... She moved away for college but is coming back this december and I am not to stoked on that =/ I feel like i cant talk to him and we dont really talk to each other like REALLY talk and I love feeling that i can just open up to someone and be heard and understood without any hiding. And I'm not sure i feel that.. I feel very close to him and love him dearly but i feel like theres something missing something big but i cant put my finger on it...