Engineering is consuming my life.

(19M)I have always been average in studies. Scored 62% in CBSE 12th, and anyhow i managed to score good in JEE, because of that i got into tier 2 reputated college in indore. I'm having semester back (total 6 atkt(s))and been sitting at home for 6 months. I was very popular at school and had many friends, as i started persuing engineering, my friend circle started to shrink. I've always celebrate every festival with my friends and family. But these 6 months were extremely hard for me. It's like i got isolated from the rest of the world (i even deactivated my socials just to focus on studies). To this date, I don't have a single friend left. I'm sober all day. Exams are here and my papers aren't going well, even when I'm studying and putting efforts, feels like it's all for nothing. No matter how much i study or try, i fail my 1st year subjects. It is scaring me and making me more anxious day by day. I've always been an optimistic guy and everybody around me always appreciated me. But now, I'm all alone. Standing there with my backlogs seemingly they'll never get cleared and a future of a luxurious life with family seems to fade away (even after knowing that engineering won't promise this type of life). Life seems really unfair most of the time for me. I don't know what am i doing with my life right now. I just know that I don't want to die as a poor helpless guy.