Yeah, it's sad and I know. You had a serious relationship with a girl and that created some kind of identity for you. Like someone who plays football for a long time, but suddenly stops playing because his legs are broken. He also wouldn't feel whole again. It basically strips away something you thought you would have worthwhile. This is the reality, my friend. I don't really know how to get the idea/fixation out of your head. What you can do is go somewhere where you can be alone and think about the past. Just think about it. Accept what happened and move on. after that focus on what you like doing or what you want to achieve in life. Also remember that in the end the true nature of your ex-girlfriend would come out. You would see who she really is and ask yourself how could I be with this woman the whole time. Also remember that she will hit the wall and you will age like wine. Also remember that if you would marry her that you would be screwed. Also remember that when you are with her for a long period of time she can cheat on you and you would feel worse. Also remember that if you were still with her for a long time she could nag and so on and so on.

As for friends I had a lot of friends, but for me they all were friends that betrayed me in the end. They literally hung out with me when they needed me and a female would go always before me. I suggest be alone for some time, but if you really want friends I would say get a gym membership. You can meet guys there who also are interested in working out and you will see them frequently. Then maybe ask them when they train again and you can train together. maybe do some sports. Go to bars. The best way is to do something you like doing at some place and eventually you will find someone who has the same interest as you. If you need anything else I would like to hear it.

p.s you can search 10 years for some nawalt which doesn't exist to begin with or you can use 10 years to better your life.