Advice!

Im 18, and i have a huge problem with depending on a guy for happiness.. I dont know if its a daddy issue. Never knew my biological, met him about a yr ago but havent talked much since.. my step dad who has been my basic father since birth off and on, got into a falling out and i couldnt stand him. got a divorce from my mom and now i secretly will talk to him every now and again and we get along better but i still dont see him much. My mom and i dont have much of a relationship anymore.. im a very independent person, i like to be alone. But as soon as a guy gets in the picture and i actually like him, its like its the end of the world if they dont talk to me. I hate being like this.. i really need help on learning how to just not care as much, being happy alone..