Asking for help

Ok so me and my bf of 6 years have stopped having sex because of me. . I just don't want to for a few months now. Really don't want anything to do with sex it annoys me when he ask and that's not fair to him. I think its because of a new medicine I'm on. So I have to choose between no sex life or finding new meds. Is there anything I can do instead of change my meds. Anything that might help? Should I ask my doctor? I would love to hear from someone who has had this problem.