I am young and happy, still i am falling in a NEET lifestyle

I am a teenager 16M, about to graduate from highschool, didnt studied much and good college seems distant, my dad dies when i was 13 so there is no scope for me to live off my parents, i was smart but then i gave up on working hard, so my grades plummeted, i used to workout, and was lean, now i gained 7+kg now i am skinny fat, i still have a vibrant social life but all my friends seems fake to me me, i made my second GF this year, who i lost my virginity to, we had sex many times, but we couldnt for the past 3 months, and since then i have been sleeping at 8am, taking leaves off school, not studying for school, watching insta reels and youtube shorts, jerking off at max 7 times, things have gotten so shitty, that even when my gf calls me, i cut the call to watch porm, idk what to do, i think my life would spiral into a disaster and i am going to live my life sexless, careerless from now on, what should i do, i had everything, all the time and opportunity, now i have nothing, tell me what can i do. Would really like some advice