How can I stop thinking about someone I want to forget?

To stop thinking about someone you need to cut ties with anything you might associate with them and generate new or stronger ties with other people. To cut ties you can delete pictures you have with them, delete old messages, stop talking to them and avoid places where they may be. Making new connections or making existing ones stronger allows you to put your focus somewhere else and can really help you forget. Hang out with existing friends or make new ones, you can also pick up hobbies that include other people to help you.

Been there- many a time. It's never easier, despite going through it all the time. Try and distract yourself and don't listen to things/look at things/do things that remind you of them. Try new songs, new hobbies, new books... You can create new memories without them in it.

i do some activities that i love and i dont think about him when he comes to my head i try to thing in another thing

My personal advice is to really watch your train of thought. Every time your mind goes to that person, try to distract yourself. This will be very hard in the beginning, but as time passes you will notice that this becomes easier and you will slowly adjust to not thinking about them. If this does not work for you, try to avoid things that remind you of them, such as specific locations or objects. You really have to train yourself to not think about them, and do not be afraid to reward yourself if you think you're making progress.

I think it's valid to tend to think of someone, for whichever reasons you have. And you've taken a great, brave step in asking this question -- it demonstrates that you genuinely care in letting go and forgetting them. There are many ways to process this, and it may be a trial experience of trying out what works for you, so please keep your head up as you patiently walk through this with each careful step. One way you can handle this is to write a letter with the feelings you've had about your relationship with the person. You can do what you need to do - burn it, rip it, throw it away, ignore it, etc. You can also receive support from others. You're here for advice, but having support is great too. Having someone to listen to you and hear out what you have to say about the person can be so helpful, so a friend, family member, or listener here on 7 cups can be there to support you! One way that helped me let go of someone I thought about often was discovering my passions and hobbies. Having an enjoyable activity that I pursued challenged and motivated me to do it more to develop myself in the journey, and I fell a little more in love with life in the process! I encourage you to brainstorm a list of a few things you like doing or always wanted to explore. It's okay to think of them sometimes, and if you find yourself doing so, please be understanding with yourself and assure that you're doing your absolute best. Hey, you asked the question, and that was the first step! =)