My boyfriend's friends hate me...what should i do about it?

okay so my boyfriend and i have been dating for about 4 months and we've gotten extremely close especially recently. we met about 5 years ago at work and have always hung out with the same small group of close friends/drinking buddies who had been supportive of us starting a relationship and even helped nudge us into it since we've both had crushes on each other for so long. basically things have been really good for us, but recently my boyfriend's friends have stopped wanting to hang out with us apparently because they're jealous of the fact that he has a girlfriend and they don't. this one kid, we'll call him glen, has always been the girlfriend type and has never really been without a girlfriend. glen's ex broke up with him a few months ago and he was pretty upset so i tried to hook him up with one of my girl friends. needless to say, they didn't exactly hit it off. the four of us took a trip upstate to stay at his lakehouse which was a lot of fun until the two of them got into a few arguements which escalated into full blown fights. i guess i thought they would have gotten along better than they did. now besides that small mistake, i have been nothing but nice to glen and have tried to be extremely friendly. another friend, chase stated that he enjoys hanging out with both my boyfriend and i but he would also like to hang out with my boyfriend alone and have guy time. i've wholeheartedly encouraged my boyfriend to participate in things like this but he refuses and says he'd rather spend time with me. i just feel like his friends are getting annoyed with me and are starting to hate me for stealing away their friend which is not my intention at all. i miss the days when we were all good friends just hanging out, it seems like we don't do that anymore. now that kid glen recently deleted me on facebook and completely ignores me in person. he also deleted my boyfriend but is still civil with him when we hang out. it's not that i care so much i just don't really understand what i did wrong and why he's being like that. i would like to hear any suggestions on how to fix this...should i write him a facebook message or confront him in person? my boyfriend thinks i should brush it off and let it go but i don't know if i can just do that. i'm currently suffering from some internal personal issues and trying to make changes in my life...it's been difficult in the past for me to make and keep friends and it's something that really bothers me. please give me some advice...