Why do guys never call me?

Whenever I exchange numbers with a guy, he never calls or try to contact me. This has literally happened EVERY time! I asked my friend(he is completely honest) if there was something wrong with me and he said no. I am very friendly and sweet and skinny and I guess pretty. Why does this always happen?

?2016-10-28T20:54:56Z

If I knew you better I may be able to answer this for you but considering what you wrote I really have no idea why. You seem like your a pretty awesome girl. The only thing I can think of is maybe guys view your guy friend as a threat or they think he's your bf?