friend drama / facenook bs

Sometimes I wonder how different my life would be if I stopped being friends with this person. For privacy reasons I won't say their name but  we will just call them Jane. Last year I threw a Senior Summer Party, and I invited Jane because we were friends. I invited her to my FaceNook Event, and she said that she couldn't make it and came up with some bs excuse. The next day I found out that Jane went to my Ex-Best Friends party instead of mine. Her name is Evelyn, and I'm telling you that because she deleted her space hey account so we should be in the clear. 

But anyways I was really hurt by what happened and I talked to Jane about it. I mean I guess we were okay at the time. I just felt... sort of betrayed in a way. 

Idfk, I need therapy xp