Accept its over, they wasn't right for you and now They're gone. DONE. But the human in you says no the first step is always denial not acceptance; Maybe you still think it was one of those regular fights you guys have, the ones you get over after a week but it isn't. So to help you understand I'll explain what breakup is; breakup happens when one person stops trying, when they tell you it's over and they mean it, when they stop hanging with you, when they give up the fight to stay with you and lastly when they seize to become the person you first fell inlove with and you lose all feelings for them. Let me put it in this generation terms; when they change their relationship status to single, when they stop texting or replying to you, when they unfriend you, when they block you or report you or worse when start quoting Drake in their posts.
It's called the past for a reason, It's gone, dead and buried. This is where you accept everything that's happened. Let the past go and try not to change anything. Start by getting rid of anything that reminds you of them and try not to stalk or even think about them. Keep yourself occupied and don't fantasize or have nostalgistic dreams about you two together because it ain't gonna happen. Accept that it's you againt them now not the two of you against. Adopt a new lifestlye, focus on yourself and make a new playlist. Refrain from sad songs they promote nostalgia. Be positive always, smile more and be open to new experiences.
Regret is only human nature, accept you're gonna miss her. it happens, so what? All those arguments you think you can go back and fix, well too bad they happened and you can't turn back time so move on. it's kinda pathetic moaning over that person over and over when they have forgotten about you already. What are you regretting it for? why are you punishing yourself? Is punishing yourself solving your problems? no? then its time to let it go. You're only human, you did your best and if that person couldn't see your efforts then they didn't deserve you to begin with.
Understand lost on a whole different level. People leave, they always do (they die, they disappear or they just leave) so thread carefully and accept the fact that nothing is permanent.We were all born at different times; we came to this earth alone so we ahall also live alone. My advice is always live for the moment, do all the things you want to do today, don't save it. Remember nobody belongs to anyone and so don't think you can save people for later, if you want to be romantic don't wait for Valentine's day or the right moment. Don't wait for the right moment, make the moment right. Think of it this way, are you gonna let the possibility that someone might leave you later stand in the way of your happiness?. Do it now and minimize the regret later because at the end f the day you're only gonna regret the steps you didn't make. Also make future plans but also make plans for the for all the questionable dreams, make back up plans for all the what if moments in yur life. Ensure that you're emotinally, physically and mentally ready for whatever comes your way, Always be at an attention soldier, love is a war. I get over breakups faster because I collect memories instead of people. People change, Memories don't.
You got hurt now its time to tend your wounds and be healed. And nothing screams repair more than forgiveness. Having animosity over someone because they hurt you just makes you bitter. Accept he/she wasn't a terrible person. Stop playing the blaming game and accept both of you are to be blamed for what happened. You acting like a douchie when she needed you and she cheating (whatever the situation was, relationship is a two way street and your actions towards eachother determines how healthy your relationship is). So forgive yourself and forgive him/her and you'll find peace.
When you lose something you value/ need and you can't get it back. What do you do? you replace it with something just as great. I'm not suggesting you find rebounds but after your rebound time is over, clean up and step into the dating world head on again. At the end of the day you're not just looking for sex, you seek that because it makes you feel good and loved for a couple of minutes. You're all hot and beautiful people, you shouldn't have troubles with finding women/ men. The real deal is out there, you just have to look and you'll find it.