Am I crazy?

I need some advice for my relationship.

Ive had a boyfriend for almost two years but he broke up with me two months ago, a week before we were supposed to move to another state together. He said he wanted to find his individuality and focus on himself. It was rough but I understood. Then less than a week of our breakup, he started talking to another girl from his work. He continued this to the point where he lied to me about her and led me on. I still went on to move to the other state, not knowing what was happening between them.

After 2 weeks of me moving I had to come back to state for an appointment, during that time I went and saw him. And we had a really good time. Then he confessed his feelings/love for me and said he would stop talking to the girl. He did do that but lied to her and didnt tell her about me. At the time though I decided to give him another chance. Then I found out everything. All the lies. And it was like all hell broke loose. Ive never felt such pain before, especially from him. I became so confused and we talked multiple times. He insisted that he would never hurt me again and would like me to give him one last chance.

And of course, I did. So now were back into a relationship, slowly letting our friends and family know. But Im very insecure, and find myself becoming that label of a crazy girlfriend. Ive gotten into the habit of seeing when hes online during the times he doesnt text back or questioning him repeatedly about the little things. We both know I dont trust him and I always thought time and effort will heal since I havent completely moved on from what happened. He exclaims that he understands why Im acting this way, and continues to help me through it. Determined to gain by trust back, although he hasnt really done anything for it. I still appreciate this and would like to make our relationship work. But now were in a distant relationship with some issues.

How am I able to overcome this situation and help my relationship while healing from the pain?