Love breaks friendship??

It's not fair!!! NOT at all!!
I just remembered something which happened 2 years ago to one of my best friend.
Well, yea, he got confessed by a girl in the campus, and he accepted it. Till now, he is still with that girl
But there was bad times happened back then.
And what is that? Me and 2 other of my best friends, ever thought that he wanted to trade our friendship with love just because he already got one.
He didn't attend our usual meeting after lecture, he often didn't attend lunch time together, he often gone by himself leaving us 3 behind, he sticks with his girlfriend during study, lecture, etc.
We were somewhat irritated with him for some weeks. Why? Because he himself didn't even made a contact with us 3 as about why and the details he went first, not stick together.
One more worse thing, there was one guy within us 3 who were having his b-day. All of his best friends were invited include that guy. But what? He rejected the invitation, so yea, this best friend of mine, held the party with that guy missing. After it was over, we all met again in the campus. But here is one thing, he didn't wanna attend his b-day's party, but WHY HE WOULD ATTEND HIS GF'S SISTER'S PARTY AND EVEN STAYED AT HER HOME FOR ONE NIGHT?
That's just RIDICULOUS!! Yes, as the repayment, we neglected him for 2 weeks or so. After about 2 weeks past, he was called to my boarding place to held a meeting. Luckily, he attended that, and we 3 forced him to pull anything that he wanted to say. That's the bad times.
I was kinda depressed when i remember that

It's just not fair, that all friendship got broken just because of a simple thing called love. I just wish we could adjust more thus could keep friendship along with maintaining the lovely times.

I myself ever felt that, and yes, it's hard to do both. But what gives. For my experience, i had to break myself up with a girl who loved me, it's just for one, FRIENDSHIP!!! I felt that the lovely times were somewhat being dark juice to me, so i decided to just throw it up, and back to friendship with my friends.