Help please!! ❤️

I'm in a bit of a pickle. 
I can't orgasm. I have tried getting myself off, my boyfriend has too. I just can't.
I think I have put too much pressure On it now because I don't even want to have sex anymore!! I feel like I'm letting my boyfriend and myself down! 
Basically when my boyfriend goes down there it feels amazing and he is good he definitely pleases me!! But I get to this point where I just can't take it anymore and I try to push him away or try and wiggle away., OR it tickles to the point I'm crying with laughter!! (not a turn on 😂) I'm also terrified I will wee myself!! 
Has any one got any tips? I'm 22 and would really like to to orgasm 😌😂