I am feeling down whats wrong with me?

i am 27. im not a bad looking guy. i am also a believer of the saying, "no one can make you happy, they can only add happiness to your life." but i feel like i am missing something. i feel like i miss somebody that i can have as an anchor some one that i can listen/help and they can do the same. but i am having trouble doing that. i notice a lot of girls always fall the guys that are more *** wholes then me. i guess im just getting worried because i am noticing my friends are getting in relationships and i am just here getting rejected. what gives? about me: i have a cheesy humor, i work out a lot and i am kind of an extrovert.