Am i actually gay, not bi?

I appreciate this is an annoying question that really only i can answer myself but i'd like the opinions of some other bi women to help me out :) I labelled myself as bisexual when i was 15. At the time, the label seemed to fit. Between the ages of 16 and 19 i only dated guys, meeting girls was impossible at that stage. I went out with guys i wasnt really into, just for the sake of experience. Any sexual experiences were purely to gain confidence as well, they werent particularly enjoyable. I found myself doing it because i should rather than because i wanted to. When i was 18 i feel completely head over heels for a guy, but i remember my first kiss with him so clearly, i was so so happy that he liked me but whilst my mind responded my body really didnt - my first thought after we kissed were 'where were the butterflies'?? We eventually broke up because we had no sexual chemistry. Then i went to uni, hoping to finally meet some gay ladies. I ended up in a one and a half year relationship with a man. He was the most amazing person i'd ever met, but i spent the whole relationship wanting to be with a girl. We very rarely had sex, when we did it was fine, but i was doing it more as a favour to him because i loved him. Eventually we broke up because he wanted me to go and try being with women, he said it was all i talked about and that he thought i was gay. Ive tried it now, and i can honestly say its opened my eyes and helped me to understand so many things. I remember kissing the first girl i was with and i thought yes, now i actually understand why people kiss, i actually felt a bit emotional. It sent shockwaves through me like nothing i'd ever felt before. When i kiss women it feels like the prelude to something else, i actually feel turned on and want to take it further. I want to have sex because i genuinely feel like it, not because i have to. When a girl i like touches me, even if its just putting her arm around me or holding my hand, i feel it throughout my whole body.

But, heres the question...do i only feel like this because ive been building up the idea of being with a woman for so many years? Because i put it on a pedastal? Or is it just my body's natural reaction to what actually feels right for me? I feel like ive spent so much time thinking about women that ive pushed men into the background. I dont think i can say that im not attracted to men, because i undoubtedly am, i love their bodies, i think theyre beautiful. And on a mental level i connect far better with guys. But maybe i dont want to have sex with them? I dont know. Its confusing. This is the first time in 5 years that ive actually questioned my sexuality. I always scoffed when people said bisexuality is a transitional phase, but i accept that for a lot of people it is. I just didnt think i'd be one of them.