Hi Ashley,
Thanks for the boost!
I do try to volunteer and join new groups to meet new folks, but it takes me a while to really become friends with someone. I think that is why I rely so much on a few good friends.
I think I often place too high expectations on myself and others, and end up feeling disappointed. I sometimes cope with this by avoiding people, plans, commitments and challenges so that I won't end up feeling disappointed. That is unhealthy, and much of the reason why I am here.
As far as making a plan for coping with disappointment:
1) I notice that the low feelings and negative thoughts don't last too long (I think they used to last a lot longer when I was in the depth of my depressive episode). I don't hold grudges against my friends either. So I can write these observations to myself in my journal and then when I am feeling disappointed, or rejected, or worthless I can read them and have proof from my own experiences that it will pass. I have noticed reading positive things I have written can help when I am feeling depressed.
2) I can then acknowledge these emotions as human emotions that happen and use the principles I have learned through mindfulness practice to be present in the moment with these negative emotions and not to analyze them as meaning something broader like "nobody likes me they're all just being polite".
3) It would be great if I could then go do some physical activity that will make me feel better. But sometimes it is very cold and that is not a wise option.
4) Another thing I could try when someone has cancelled on me, is to contact another friend even just to chat and catch up. I have a lot of friends who live far away and it is not always easy to keep in contact. Being let down might actually be motivation to do a better job of maintaining these long distance friendships.