How to stop thinking about a guy who dumped you or is bad for you?

The best way to stop thinking about a guy who dumped you or is bad for you would be to focus on other things in your life, especially yourself. Put yourself into a new hobby or activity. Learn a new skill or even go to the gym. The best way is to distract yourself and find fulfillment in yourself and understand that you deserve the best and the only way to do that is to treat yourself the way you deserve to be treated.

Remind yourself you deserve better and think of what else you could do to benifit yourself without a boyfriend. Also do activities that make you feel better about yourself.

I would say that time is key in this situation. It might not be easy at first, but through time the memory of that person will slowly disappear. I think distracting yourself with things that don't remind you of him will help a lot, maybe even meeting other people. Except we shouldn't use people to forget someone else, it isn't fair for them so we should only be with someone else only if we're truly interested in them. Then, eventually you'll realize that the person you couldn't stop thinking about wouldn't have made you happy and you'll get to move on :)

Do something to make yourself feel good about YOU. Exercise, or read a new book, or spend time with people you feel comfortable with. There is no easy way to deal with loss of any kind. Just remember that your future is unwritten. New people, places, and experiences are key! Just be safe.

Revisit your friends. Keep your friends around you and spend plenty of time with them. Talk things through with your most trusted friend or friends but don't go on about the excuse or the breakup with people in your wider circle, as it can be overkill and make everyone feel worse. Instead, let everyone know that you're free to spend time with them again and that you are up for activities together.

It is often hard to avoid thinking about upsetting or traumatic events. In the short term distraction can help, so perhaps spending time with friends or speaking to family member, so long as it as an active interaction with people who are supportive. Finding meaning in the experience can also help you to move forward, so what did you learn from it, for example how to set boundaries or the need to meet someone who respects you in a relationship. Journaling can also help just try to move forward and let the thoughts come naturally because with time emotions pass.

You can watch movies or listen music. You can talk with you friend about it and know their opinion, maybe they will be able to tell you things you didn't see about him. Try to remember that life is well made, so if this is happening to you, maybe it's for a reason! :)

Start focusing on yourself - once you have more confidence and happiness your mind will no longer feel the need to dwell on people of the past. This kind of mindfulness is essential for moving on

Start thinking about yourself. Take the 'single time' and focus on loving yourself. Self-love can turn into something beautiful if you do it right. :)

Fill your time with something useful. The way in which you spend your time after a break up is crucial to how well and how quickly you get over someone. It's also worth remembering that you may be fixated on them simply because they are bad for you or dumped you. Would you really want them if they sat under your window every night pining away for you? Probably not...