What is wrong with me? :'(?

im only my true self around friends..im only happy around them and i feel like i belong when im with my friends ...i was soo used to being around people and friends the whole of last year as i was in a boarding school...and now im back..and i got nothing to do..the reason i went there was cuz i felt lonely evn tho i had many friends.....and im ALWAYS moody at my house...im always pissed of with my mom and she tries soo much to make me happy and she gets me everything i want just to make me happy...but nothing other than being around my frnds makes me happy...i try so much to be happy with my mom but i just dont get it! and i just feel like running away from home...somewhere far away...and my parents are always hurt by how i behave at home..always grumpy...the only thing i think about are friends! im getting mad!!i dont know what to do..i always end up crying thinking how lonely i am...when my parents or brother talk about how many friends i have or that i should be more social...i get mad...i start crying..and end up being depresssed for a very long time...i just dont seem to find happinness at home..even tho im given everything im wanted...and i try ALOT to be happy it just doesnt work....the only thing on my mind are friends...i always want a lot of friends and i only want to be with them.....im going crazy! and my old school friends are busy with their boards..and since im back..theres no one else..i am so lonely...i just miss my boarding school friends alot....i was with them the whole time...coming back home to such a lonely place is drving me crazy...one months passed since i cam back..and im still so miserable and dont go out