Never cum

Sixteen and never came. Masturbated since I was sooo young like nine I wanna say. When I’m with my boyfriend I get really turned on but it just doesn’t feel that good but it doesn’t feel that good if I do it myself either. The closest I’ve ever got is with an electric toothbrush but even then haven’t cum. What do I do. It’s definitely also making my boyfriend insecure since he knows I haven’t with him.