None of this is easy and I’m sorry you’re having to deal with it. Picking up the pieces after a long term relationship is over requires so much mental and emotional energy. Be kind to yourself during the process and allow yourself plenty of time to deal with all the feelings about everything.
If you can, try reaching out to people from your past and reconnect with them. Or take up a new hobby or volunteer position to meet some new people.
You might be feeling hurt and alone right now and for the foreseeable future, but it’ll get better. Stay strong and go out of your way to spoil and pamper yourself as much as possible