Most Helpful Guy
A girlfriend is better, she provides you with some feelings that a fuck buddy can't provide. It's like it feels a possible emptiness you can have. A fuck buddy is just there for sex, and with a girlfriend you also have sex, so a girlfriend is much more complete.
P. S.: I guess sex with someone you have feelings for is better than someone you feel nothing, even though this one is great too (I haven't experience sex with someone I care for yet).