how can i forget my ex boyfriend(girlfriend)?

drink with friends will help you to relax^^ will help you to forget a bit what is making you sad. sleep with other person can help you to feel loved yes^^ but after it you wont have nothing and maybe can feel worse than before but what can really help you is put in your head that he isnt the right guy for you. and that the right one is still out there and you shouldnt waste time crying for one that doesnt care for you^^ instead should be waiting for the right one that will come soon^^ we all have someone for us^^ so just wait for him and forget the one that hurt you^^ life is too short to be crying for guy that clearly doesnt love you no more

The solutions you have suggested can't really solve your problem in long term basis. It would instead possibly bring out even more bigger problems in your life. Try to approach it on a positive note. Be with your friends and family. Those who are close to you and hang out with them. Busy yourself with your work or career. Involve yourself to some community work or volunteer. The more people you meet and make new friends, the easier you will be able to forget your problem.

Time heals all wounds, all other methods are just soothing sedatives but at the end of the day, the issue is still there.

One night stand and drinking are all temporary solutions. There's no way to forget your ex or a bad relationship but through time and meditation. If you say that was a not so good relationship you can just think that your ex was the worst and you didn't wanna recall that at all. Go on vacation, have fun with your friends, meet other people, try to keep yourself busy until the time has already pass you by and you realize that you're no longer thinking of your past. Good luck!