Why am i struggling in life ?

I feel like life is not fair, i came to the usa and it has been 2 years and i havent made any real friends, its like i have a spell, back in my country i had many friends who like me and stuff. here no one is interested in me.. i am so lonely.. i came to the usa and i thought i would be famous, rich and a movie star or a model.. and my dreams havent come true.. first i have applied for the green card lottery which i hope i win, if i do i would like to go and chase my dreams.. i am scared i wont.. i am struglling ever since i came to the usa. 2 years has been hell.. have gone through a lot of things, many bad things had happen. i dont know when this is gonna stop.. everything night i cry and wish and pray for this life to be over.. i wanna be happy and i want my dreams to come true !! :( i dont know what to do.. i have been sad for 2 to almost 3 years.. i hate my life so much !!!