Am I being immature or did I finally wake up?

Hi all, I really feel confused and sad at the moment and here's why.
I have 2 friends whom I was really close to, absolutely loved them, more like brothers to be honest, really felt a bond with them we used to hang out almost daily and have the best of times together, went on trips, outings, movie nights at home you name it. However, we went from meeting daily to just 9 times during 2016.
We were meant to go on another trip last December however, both decided to drop out last minute because they said they had too many uni things to do and they were afraid they wouldn't manage everything leaving me to foot everyone's bill since I had made the arrangements. I asked if they'd prefer to shorten stay trying to find a middle ground they said they'd rather not risk it so I said fine and left it at that, I didn't want to be blamed for anyone's accedemic failure. However, they then decided go spend a few days camping on an island near the mainland during the same dates they were supposed to be with me aboard. When I came back wanted to hangout with them because I missed them and I brought gifts with me which I wanted to give them plus exam season was near so I said lets hangout before we all go in lockdown however, they said they couldnt because of the unbelievable amount of material they had to cover, meanwhile they spent that very same night, as well as the night after clubbing.
There was a charity event a little after for a very noble cause which I wanted to attend so ofcourse I ask them to accompany me they're my bestfriends right? It was a long walk in aid of cancer one said he already made plans for that evening the other told me that he didn't want to spend the night walking but I decided to go anyway with or without them. So during the walk they went past me very quickly almost like lightening one of them must've felt bad cos I got a text from him telling me he was off to bed -.- however I chose to confront him in a very civil way- a simple was that you? Instead he made me feel like a crazy person no must've been someone else, only to wake up the next day to find them tagged in a photo.
All I got was I have nothing to say I did nothing wrong. So I turn a blind eye cos family is family regardless.
Every weekend id ask them to hang out and every weekend they make up an excuse like I'm sick or I'm visiting my granny or it wouldn't be fair to hangout with out him we are a group of 3 and we only hang out in 3s and every week they'd hang out together without me.
More 'recently' we went for drinks and I thought we had a pretty chill time so I said lets hang out tomorrow so they said yeah we could then in the morning I receive a text saying listen I'm gonna go granny's today can't hang out cos I might be spending the day there so I say ok no probs that morning I go shopping in town cos btw we live in the same town and I see them on the bus stop with their little haver sacks and swim gear clearly going to the beach. So when i asked them they lied one completely denied it the other said he didn't like how I disagreed with him on a particular subject when we met for drinks the day before, which to be honest felt like a rotten excuse I mean I'm not some robot programmed to say something when I feel another way but I bit my tongue. You see we're meant to go abroad together in September so I didn't want any arguments since things felt fragile.
So a month passes by without us hanging although we spoke all day no stop about everything and Although I asked them out every day , one time I said lets beach one said I can't getting a hair cut the other said sorry made plans with my mom however, I decided to go anyway why ruin my day right? And there they were together (btw the invite and me going to the beach happened in the space of an hour) and so we had a heated talk well me another one fellow the other one just sat there and said nothing. I asked why this treamtment? Tell me what I did or said that was wrong so that I can apologize in hope of rebonding. They said I did nothing absolutely nothing that I'm a kind and good person and that they felt they did nothing wrong so no point in discussing. that was the last straw for me tbh IMO it is the most hypocritical thing to travel with people who clearly don't wanna hang out with me! So when I got home I gave them their travel documents hotel papers changed the guest name cos I had made the arrangements myself so that the wouldn't have any problems whd travelling and left it at that. It hurts me and saddens me a lot because I love them dearly even now, even though one sent me a few insults a few days ago they're family to me, one fights with family at least in mine sometimes, very passionately, but the fact remains I love my family, and even though I'm hurt and sad I miss them like crazy. These two lads said they did nothing wrong, my biological family thinks the way they acted was rotten. So what I'm asking is did I over react at the exclusions? Or was I stupid to think I had friends in them and it's about time I woke up and smelt the coffee? I'd rly appreciate an opinion from someone not linked to either side to get and unbiased reaction that's why I posted here.

Sorry for the very long text and thanks