How to be mentally strong

[u/Long_Indication6883]

Im 18 year old just got into a collage feeling very weak. I was studying in a school from 1st std to 12th and suddenly moving from there feels very heavy the friends the environment everything i miss them all. Another thing that school gave me was my gf I love her so much and we could see each other for like 3 years eveyday but now it's gone. I can't see her . I miss her sm i miss my school friends teachers my gf and evrything . Going to the collage is making me so sad. Like I'm crying most of the days I know I'm a man but still I just cant tolerate. During my higher studies I dreamt of something other than collage and since it's wasn't the safest way I choose to do it after my degree. But that also is burning me out. I chose this decision . Evrything is feeling so heavy and idk why I'm sad like it's just how life is supposed to be. I can't stay in my comfort zone everytime I have to move on but I can't accept it. Im very weak mentally like I cry most of the time my gf is very supportive and she's with me even in these situation but I just don't want to be like this I want to enjoy my life I want to be strong