activity together

Did you usually join in some activity together ?For example ,birthday party of your firends ,a party of congratulation ,or a party of firends will leave ,and so on .How about your think of these parties.Feeling is happy or bad .Or ,you think it is a needless waste .Or you think it is good for our relationship and so on .Did you think like this party whether we often should be been held .
In my opion,like this and together activity should be been held ,and many times .I think like this activity is good for between people and people relationship.
Yesterday, my classmates and i together held a birthday party of two of us .Morning ,my two classmates went to shopping mall to buy some things of on birthday party will be used .After they came back ,together we were washed a lot of things of hot pot . And we were ate hot pot ,gave vegetabls to each other ,and so on. We looked like a familys .At that time ,i suddenly flet so warm .i think , i am bad of relationship ,and each time i didn't feel warm of my classmates until we held some activities together .Each time in the end of activity ,I always very sad .I hope to like this warm feel will don't leave.