If you can contact, you can keep in touch as a friend. If you have a connection, you don't have to think alone.
If you can't get in touch, try to shift your attention to other things. Of course, you still think that's normal. Take your time, don't forget or forget. It's no use pushing yourself like that.
You should live a good life, go out with a large group of friends if you have nothing to do, open your heart to life, and don't confine yourself to you and that old memory.