Is my boyfriend not over his girlfriend? PLEASE HELP!?

[E]

My boyfriend and I have been dating over 1 year now. We both love each other every much. But before me my boyfriend dated a girl for 3 years. And a few months ago I found out that he looked at pictures of her on twitter which of course upset me. But I realized that in the beginning of our relationship I use to check my ex's fabebook but it was just to make sure he wasn't talking about me but we only dated a few months and I didn't love him. My boyfriend now from day one told me he only had good intentions for me and would try not to hurt me. But now I found out he looked for more pictures and I'm really upset because they broke up 2 years ago! Im a very self conscious and totally heart broken. It really confuses me because he claims that she "played him and he hates her" but why would he want to look at pictures then when you have a girlfriend. His whole family loves me and have told me that his ex was crazy and not a nice person. And not to be into myself or anything but I get complements about my looks all the time. So my main question is this normal? Am I getting too emotional? I really believe this is wrong and my feelings are so hurt. Do you think he wants her and Im just the stand in girlfriend?