because hes feeling guilty himself and he probably wants you put yourself out for him more
Tell your friend how their relationship makes you feel and see if she does anything about it. If he is you Ex, then it shouldn't matter too much unless you still have feelings for him. Try to get over him as best as you can, dont try and make your friend feel guilty either. :) :)
don't feel guitly cuz you and he are not doing anything right
No. It's wrong for your friend to say anything. The ex-wife would only attend if she had to accompany their small children.
I think it's not. But if those things has sentimental value for you then in some part you'll feel guilty but if those things are just nothing and if you have a new girlfriend now, why should you feel guilty?
because they feel guilty for hurting your feelings
You cannot make an ex miss you if they don't feel it. Perhaps your ex does miss you. If they are not dating anyone else take the chance and contact them and meet face to face and discuss the relationship you had and ask them if they would like to try in the relationship again.
make out with another guy. it will make you feel much better. don't worry about your stupid jerkhead ex!!!!
Ways an ex may make you jealous is appearing somewhere with a date where he/she will know you are at. If they go to an event they know you are at they may flirt with several young women when they feel you are looking. They may spread rumors of their dating habits (who they are dating) to the friends he knows you have.
it would make him feel like you never liked him so he would feel sad
Just try to be nice :)
He'll try to make you jealous
About the Ex-girlfriend! No, I do not think that he wants to make you jealous! It's just that he has not yet accepted his ex's rejection. For in all likelihood she rejected him if he still pines for her. Inform him that you are not her, that you do not enjoy the comparison, that he should accept you for who you are and not compare you to his ex. More on relationship in book recommendation # 2 on my Bio Page.