Still traumatised after homophobic incident

Hey guys, I hardly ever post on reddi (I hope I'm doing it right) but I've got a really big problem I need to share, I just cant keep it to myself anymore. I don't know what else to do or how to fix the situation...So I'm a 20 y/o closetted gay guy living in a ghetto area of London and it's taken a while to come out of my shell and start enjoying life rather than been being total square.I started renting an apartment so I could be closer to my uni, and I met a hot guy on an app and we started talking, we hit it off really well and met soon after. It went really well and we saw eachother many more times and it was all good and dandy when one day he invited me to go gay clubbing. I never really experienced anything like that so I was super excited and said yes..It went really good and we were on the dancefloor making out and everything, I was starting to feel nauseous and was really drunk so I said if we could go back home and off we went.This is where it all started to go wrong. He was really drunk too and we were walking through a really ghetto area. It was 4am, totally dark and the streets were full of hoodied gangs. So my friend was all over me and trying to kiss me, unknowing of what this area is like as hes not from around here, I tried to tell him to stop until we got home but to no avail, and a gang of thugs saw from a distance and were walking towards us on the pavement.First they were just following us, calling us derogatory names, laughing and mocking us, and my friend tried to defend us and said he'll call the police. Thats when the gang turned and became very aggressive. They brutally attacked us, we were outnumbered and completely unable to defend ourselves. It was a complete bloodbath and we had to run into oncoming traffic to stop them chasing. So there we were in the middle of the road covered in blood and tried desperately to hail a car, but they all ignored us. I dont know if that hurt more than physically being attacked by the thugs, I would have thought atleast one person would stop to help...We finally ran into a 24/hr Mcdonalds where they saw the state we were in and immediately called the emergency services.Fast forward a year and the attackers were never found. I'm terrified of going outside especially when it's dark, I just don't know if those guys will recognise me and I've gone back into my shell. I just dont know what to do, I don't want to live like this forever... It took me so long to convince myself that a city like London would be welcoming of people like me, and as soon as I started living, this happened.Anyway, thanks for reading my post and apologies for any bad granmar or spelling (on my phone) and I would appreciate any advice.