Is my gf embarresed of me?

she doesnt really like me over her house. She lives with her parents and 4 brothers ages 7-27. She says theres never anyplace where we could be alone there. which i guess is logical...but she invites her friend over sometimes and not me. Lame. Also She always complaining i never do anything nice for her when she never does anything nice for me either. and shes just a girl why should i care anyways. Im always thinking about her and always wanna hang out with her but it seems kind of one sided. but thats what she says to me that she feels she cares for me more than i do for her. idk im just confused.