Can't Orgasm🙄

Girls help me I just can't get there! If my boy is down there it feels nice but after a bit it just gets too tickly. Imagine somebody holding you down and tickling your feet- that's exactly how it feels! It gets too intense and sometimes borderline painful. My legs shake and I get frustrated because I'm not orgasming. My boyfriend really wants me to get there but I always give up! Sex has become very one sided because I don't even want to try and have an orgasm anymore as I always end up giggling and pushing him off me. The feeling is just 'too much' but not in a good way.