Why can’t I come?

I mean I can only cum when I use a vibrator on my my clit but by just having sex I can’t. Fingering doesn’t do much for me but I love having sex especially when I’m on top but I can’t orgasm.

Idk why.. 😔 any advice on what I can do?

I want to orgasm when my boyfriend does but I can’t unless I play with my clit or get eaten out.