I'm was and still is ina very srs relationship with my boyfriend and he usually accused me of cheating whilst I didn't and some months back after I discovered he doesn't trust me at all I got myself in a somewhat awkward situation with some guy at school and we did fuck and all then after a while broke off and I decided to take things seriously with my man .BUT I find myself musterbating with that other guy in mind

What should I do ¿