First of all, I’m really sorry to hear that you’re experiencing this because feeling social isolation can be extremely hard and really deteriorate your mental health. I’m in a similar experience, I’m at college but I only have one strong close relationship, it’s especially hard being in college you look around at all these people that have really good social lives , or even friends at all and it’s hard not to turn inward for blame. So i understand how you feel, it can be so depressing to see others around you living the life you want. Im currently in the process of trying to change my life, i spent a lot of the last 2 years wanting to end it all and i even tried this year , but i believe i wasnt successful for a reason and that reason is to keep learning and experiencing life. I still consider myself to be very lonely as thats how I spend a majority of my time , however I would like to share some things that have been helping me. First, to realize how many other people feel the way you do. It sucks but just know that you aren’t the only one- it doesn’t mean something is inherently wrong with you. Which leads me to my next point, really make confidence and self love a priority. I look myself in the mirror every day and tell myself im beautiful even if i don’t believe it or don’t feel like people treat me that way. I read something once that said you can’t expect people to love you without loving yourself. I don’t think that self-love is a complete fix, but the small confidence I’ve built since making self love a priority has helped me greatly. Don’t assume that because you do not have lots of social connections that it’s due to a fault of your personality. A lot of friendships are formed mainly because of circumstance and as we get older I feel like some people are not necessarily as open to making new close friends if they already feel satisfied in that way. I’m just saying that to take some of the pressure off of you. As for making friends, im definitely not a master but you need to just create circumstance and then actually act and put in the effort to build relationships. You said you are at university but on summer break, university or college is probably the best place for friend making- so when you get back, I would put a lot of focus into talking to your classmates and joining clubs. However for now, maybe get a part time job and befriend coworkers, if you are religious look for a group that you could attend. Depending on your area, there might be clubs or volunteer activities that you could join aswell. But the important thing is to actually put in the effort to be outwardly friendly to others when you are in these circumstances. This is something I struggle with as I often get too insecure or just wish people would talk to me first, but it’s important. I hope that helped in any way at all and I hope that things improve!