I also have a similar experence,it's very hard time when i haver dinner or have supper with my friends.
Several monthes ago,she produced a boy A to me,in that time she have boyfreind,but he in another province. It haven't occered to me that A like she,but she didn't told me.
But,you know,to be lover is not a easy thing,because when i saw he first sight,he just give me a good pression,it's all my feeling````````
I n the end of story,my friend say goodbye to her ex-boyfriend,be the girlfriend of A.So,this "triangle relationship"make me feel embrass when we meet in school,party~~~~
May be if you feel the man don't care what you have and although don't have any promises, but he try hus best show you in his actions.
About wheather make friend with those people,i know this problem is difficult,but what i can say is:try to change you attitude and value
All of those is what can i do for you.I don't know weather it is helpful.