So my boyfriend has a very bad history of just sleeping with girls and than leaving them. We were best friend for 4 years before we became official. He left for boot camp 3 years ago and pushed me out of his life for 6 months while he was gone and when he first came back. But we always kept in touch even when we both were with other people.. Well two weeks ago we started talking again and last week he asked me to be his girlfriend.. We hang out pretty much everyday. I have no reason not to trust him just am scared, with his past how do I over come it?

(This last time was the first time he stepped up and came to me and wanted to hang out and he brings me around his friend and he never has before)