history: There was a movie I really wanted to see. I invited a friend to go with me, but they decided they didn't want to go with me because they had already decided to go with another friend.  The other day_comma_ there was a movie I wanted to see. I invited a friend to go with me_comma_ but they decided they didn't want to come because they were going with another friend.  That really sucks... did you tell them how that made you feel? 
current: No...I guess I should have. I guess I really think they should have went with me too, or invited me to go with them. 
next: I would tell them.. and if it happens a 2nd time then they arent very good friends to have! :/