I Can Ejaculate Easily with Boyfriend But I Can't Orgasm

Dear Betty,
I am 21 and have never been able to reach climax alone or with a partner. I can ejaculate quite easily though, but i worry that its caused from some kind of pressure build up that triggers my bladder as opposed to arousal, as when it happens I don't feel any closer to orgasm and instead just fear it actually is urine. Can this happen? Is it actually ejaculating that with lead up to orgasm?