Possible to get over oneitis while maintaining relationship?

Classic problem - amazing girlfriend, she’s an athlete, smoking hot, very type A. Didn’t get exclusive too fast, had my plates and life was good. Eventually though, she got me and we decided to go exclusive, two months in though she found out I had cheated on her with another woman while my girlfriend was visiting home. We broke up, and shortly later she comes to me and says she wants to work things out. The way she treated me did a 180, until it didn’t. I went through, voluntarily and regrettably got rid of all my women, gave her access to my phone, etc. to placate her. Things were fine for awhile, but things have gotten boring, she’s wanting to goto bars with her teammates and then asked to take MY weed to smoke with her track male teammate which she claims is just a friend. Don’t think she’s done anything, but can’t help but feeling like this isn’t for me sometimes. I bought a house and she’s wanting to move in with me and help with the rent and everything, which is fine, but since this relationship I’ve quit hanging with friends, seeing other people and being social overall to help her with her fears. Is this saveable? Should I just end it, or is this something I can fix?