I use to feel the same way. And now I have a lot of friends and a family of my own. What I did was changed my standards in people and accepted them for them and even if I had lots of feelings or liked that person I would not revile it intil they show me the same as I feel. Then you can become to trust and share your part because if you tell them immediatly they may take it for granted. And every since I've changed my thinking it has help. Because I never trusted or loved anyone intil I was 24 years old and I am now 26