Is It okay to do this?

Is it okay that you have emotional, unmet needs from your father (that cannot be met unless he changes because he is emotionally unstable) and this hunger for love to be fulfilled by a gf/bf? I am so afraid that my feelings for my gf aren't love but this hunger.. But is it okay to have her fulfill that void, or will I have to find someother way to fulfill it.. I am just so afraid of this relationship becoming obssessed love, and/or it failing because of this little thing.. It is really really bothering me.. And I am so afraid that it isn't love, cuz I am afraid that i'll "fall outta love." i really really do care for her.. I know, I know I worry too much.. But for me to stop worring, I need something to stand on and say it'll be okay...