Why can’t I.???

I can’t cum.!!! 😭 my bf can’t make me cum or orgasm nothing.!! He goes down on me we’ve tried vibrators foreplay everything n nothing, he’s even tooken a pill so he can last longwr n I still can’t. 2 other guys have made me cum in the past but it was hard idk why I can’t cum but if I’m watching porn I can make myself orgasm real quick