Update: alright success you can say.
it was a very very long process atfer making her cum like 3 times in a row i finally came. one thing i think helped me which i wonder if will help you too
just put lotion on your dick so it becomes sensitive and do that for like 3 days and also dont wack it for like a day or two. get in a position that is most like the one you usually cum with by yourself (for me it was her being on top) and just work fucking hard, your dick will be sensitive a bit but dont stop.
also i didnt use a condom so yeah that helped but still takes me a bit. thanks for the advice