<human>: So one of my best friends got broken up today. They were together for only 6 months but he gets attached really quickly. They confessed their love for each other a month or so ago and he told me how happy he was with her all the time (at leas until recently).

He has a problem with being too clingy, that's why his last gf broke up with him, she felt smothered and couldn't take it. We talked about that a week ago, when he felt that his girlfriend is getting more and more distant and he was literally worried sick to his stomach because they hadn't seen each other for three days (she works two jobs right now often 12 hours straight, understandably that she needs alone time). 

Us boys went on a two week vacation a few months ago and he basically could not put his phone away chatting with her. We thought maybe both of them just enjoying being in contact 24/7 but it appears that he was just totally overbearing (again). Another example would be how on the very few times he went out drinking with us since they got together he would not crash at my place anymore (which is easier and much more convinient for him) but rather went out of his way to get to his gf apartment no matter how drunk he was, just to be with her for those 4 hours before we picked him up the next morning. He even admitted his gf hated it when he comes home drunk like that after a night out with us guys, but the still insisted on going to her place.
He also told me how he feels like shit now, because he put so much more into the relationship than her, that he embarassed himself for, lost his dignity, put his pride away and was a total suckup to please her, just to please her (all his own words). Even told me despite loving her he feels really angry toward her often.
dude is legitimatly a great guy and the girl really treated him like shit at times, something he did not deserve at all. 

I never had to deal with helping a friend through this, so could you please offer some advice how I can help him get throught it?

Give me a shortened version of the text
<bot>: Best friend got broken up with, dude is pretty clingy when it comes to girls, heartbroken now, want to help hiim the best I can.