How to make more friends?

I need to make more friends (perferably close friends) but I don't really know how I'm suppose to make more close friends. I have such an issue with trust now days. I really have issues getting emotionally close to people, it's like a fear. It's not that I've had a horrible childhood, it's just that I've dealt with SO many decieving people that just screw me over so now I really can't trust anyone. Because of that, I don't know how I'm suppose to make more friends when I can't open myself up to others. Does anyone has any tips on how I can open myself up to others more and not be so cynical of others?