Plz help I just want to feel some form of happiness

Hi ladies, I am kinda afraid to post this but here goes, I'm struggling... I have been for awhile and Noone knows about it bc I really don't have anyone anymore. I just can't remember the last time I was happy or I felt I had a purpose to live. I'm failing uni bc I feel so anxious going to classes, I can't seem to keep anyone in my life because they all use me until they're bored or find someone better and everyone sees me as that bubbly, happy positive quiet girl. But the truth is yea I might act that way but really I'm so far the opposite I'm afraid of what I'll do if I keep having these thoughts. Every day I struggle to get out of bed and do day to day things because I feel so anxious and sad that it's just not enjoyable to be awake so all I wanna do is sleep bc I don't have to think about anything then. I don't think I can deal anymore..