Lost in Love

Ive been with my boyfriend/baby daddy for almost 2 years, i met him randomly during summer time...while i was still in the begining of a  new relationship that i started basiclly because i was trying to get over some one ....and then i met him ...but the situation is that i always still think about my ex which was a female she was my first female (2nd sexual)relationship and it was so intense..and i mean ..sexually and emotionally that i always seem to compare her to him ...even though she was extremelly possesive its still diffrent because..me and him always argue ...alot more then i ever did with her.. ...even so i keep trying to remind myself that i should be with him...and i dont know if this means ..that .im still in love with her..because i always compare them  and i always try contacting her just to say hi....and i jsut cant forget the fact that the sex , was completely amazing,and  i dont know what this means..i dont know if im still under the category of bi.....or what it is ??....i just am so confused...and now the situation is geting worse because me and my boyfriend are getting more serious ..were about to live together  ......but i just cant seem to get this all out of my system..what does this all mean???