Don't be friends with him until you're over him and have enough of your own life. Otherwise you'll become obsessed with him. I've struggled with breakups as well and for me the things that helped were:
- keeping busy with friends and family
- travelling to different places (even if it's just another city in the UK)
- either venting on TSR or simply writing down everything in my notes app on my phone. writing it all out really helps you process things and stops it going round and round in your head
- make a conscious effort not to check his instagram/snapchat stories. you don't need to know everything that's going on in his life, it'll probably make you feel worse
- honestly tinder helped quite a lot in my most recent. it made me realise that I could have a good connection with lots of other boys. it's easy to think your ex was perfect and you'll never meet anyone who can make you feel the same way but it really isn't hard to build that connection with a new person. even if you don't want to meet or date anyone, it can be a good distraction.
- find a new tv series to occupy yourself and become obsessed with
- work on self improvement - working out, eating healthier, switching up your clothes, making a bit of money, reading interesting books.
- if I'm feeling lonely it can help if I just get out of the house and be around the general public so I'll just go to the shops/supermarket and being around other people makes me feel like I'm socialising for the day