Lyric discussion by Gaslight45 

Cover art for You Got Me lyrics by Taking Back Sunday

if you look at it from a more general perspective i kinda think it could be someone who has been in love with a friend of the opposite sex for a long time, and now their saying, look ive been with you thorugh all this and if you want me im here. although i do agree with the pregnancy thing i just think you could also apply parts of it to a wider theme