am i bi or a lesbian ? - could this end my relationship ?

Hi there
I've just joined this site so sorry if im missing some forum etiquette.

Ill start from the beginning. Im a 23 year old female from the UK . Ive always known Ive been attracted to girls from a young age despite never having done more than kissed them.I have only had two relationships both with men (one which i am still currently in and have been since the age of 16) Both knew i liked women and knew i find them more attractive to a much greater extend than i do men.Apart from them knowing about my sexuality none of my friends or family do.My family until recently were heavily catholic so i thought it best not to tell them.

Anyway fast forward to now, Ive been in a relationship for a long while and i can say that my partner truly is my best friend and i love him so much but i do not feel physically attracted to him at all. When i think about it , I don't know if I ever really did or if I started this relationship because at the time i was at a bad point in my life, when i felt like i didn't have control of my decisions ? I literally fell out of one relationship and into the next within a few days. Or is it because of a societal norm that i should be with a man?
I find myself increasingly interested in exclusively women and the more i think about it, sorry if this is TMI even if im watching porn with a man in it , i am ignoring him entirely and focusing on the woman.

any advice would be much appreciated :bang::bang:

 

thankyou for replying . I have once briefly discussed the idea of a seperate relationship however he only favoured the idea because he said he didnt see a lesbian relationship as the same as a male/ female one and he thought it could end up with threesomes -_-. As much as i care about him i dont think he considers a gay relationship as serious , which kind of upsets me as he knows I like women. I dont think he realises the real connotations of it.