Im very confused???

Ok so i dont know what is goin on i dont know weather im just confused or this is really what i want I came out to my family about four months ago that i was a . so i had a gf and then we broke up and then i moved away cuz i couldnt deal livin in the same city as her. Now im just gettin comfortable and dont know if i was just her that made me want to be a woman or am i just really a ? cuz i met this gurl and i can act like a when im with her and then i can go out with my straight friends and talk about how hott some guys are is that weird? Is that what you call bein bi? I really like bein with a gurl but i dont know how it is bein with a guy so im just confused on what i want and what i am. I dont want to be wrong and be unhappy if i pick the wrong gender to be with. So do alot of youths go through this? Im only 19. Im i the only one who feels like this? i dont know what i should do. If you have any words of advice (not mean or rude one) then im here to listen!!!!