I've had very few friends, usually what I called friends were kids my age who lived nearby and I just sort of followed around when it suited me. I wasn't often included in their games, everyone tended to avoid me and I was always told I was very 'flat' or 'off putting'.
Although I had this one friend, she was.... not very nice to me. We had woods out back of our house and there was a little ravine and some sort of clubhouse made by some older kids and she'd constantly ditch me there. I guess I couldn't take a hint back then (I was really clueless on social stuff, sorta still..), I didn't really understand that she was sick of me because I was just being friendly. She'd say 'I'll go meet you at the spot, see you in a bit' and I'd go, play with sticks and realize it was an hour later and no friend.
My mother blamed it on me for not being smart enough, 'falling for it' all the time.. My mom favored my 'friend' over me anyway.
Needless to say, I did stop talking to that person. I actually just sort of went about my business, she was always rude to me throughout school and actually told me she'd push me off the stage during graduation if I touched her hand because we were suppose to hold hands during one of the songs..
I've had so many bad experiences with people, bailing or not, that I might make plans to meet people but I usually make the plans my own and if I don't see them in a specific set of time then I go about my business and do whatever I was going to do. That way I guess I don't feel bad for people not wanting to be around me.