How do I stop laughing uncontrollably when I have sex?
I don't get any pleasure from it and to be honest I'm resentful of my boyfriend who gets so much pleasure from it while I get nothing.
And it just looks so ridiculous it makes me laugh so much, which he hates
Accept your true nature and fuck women instead. Or fuck nobody if you don't like fucking. Or consider communicating to your BF what you like, assuming you even know what you like. You may not know what you like since like many women you just passively hope a man will figure it out for you. Try masturbating, see what works for you.