Help..mein kampf???????

aight..so my problem is that im 18..going to college..have my own apartment...get around 2200 a month for usual spendings..My parents pay for everything of course. I just want to know if i can still do what i want since im 18..But the problem is my parents pay for everything..so should i still listen to them if they're unreasonable..Should i tell them that i got my medical marijuana card?? i'm just lost..I dont even have friends in college cuz it's like a community school..I'm too stoned all the time so i get self conscious around girls..i sleep alone every night..wtf do i do?? theres sooo many problems.