No sex😤

I’m losing my mind! What would you do if your boyfriend of 4 years masterbates more then having actual sex with you?!?!? Because I’m I am not handling it well... anytime I even remotely close try to do anything sexual or even dirty he changes the subject or ignores me... we think His testosterone levels are off because this has been going on for to too lon. He and I have noticed changes sexually, mentally, emotionally and physically. Made a doc apt to see what’s going on but if there’s no problem with the levels I’m pretty sure I’m gonna loose it...😫