No orgasm

Stephanie
So I've been with my boyfriend going on 7 months now. I'm 19, been having sex since 17. I've never once orgasmed. I've tried masturbating different ways with and without toys and lube. There are times when I get to a point when it burns and tingles in a good way but I can never seem to push myself over the ledge. Even when my boyfriend rubs my clit my legs will like spasm it feels so good (also, why does this happen?). Is there anyone else who has had this problem too? What can I do to be able to get my first orgasm?