My life feels useless

I’m 22 and still in university, I keep failing classes, my mental health is terrible, never had a partner or been in a date or had my first kiss yet. I don’t remember the past time I hung out with a friend, I don’t really have friends anymore. Meanwhile other women my age are graduating university this year, they’re happy, they’re engaged/already married, one literally got married like a week ago. I try not to compare but it’s hard. Getting off social media doesn’t help because my mom sees the posts too and then mentions them to me. I feel like a useless and worthless person who’s not doing anything in life and i feel like my mental illnesses control me and cause me not to do anything