Move on. That's the best thing you can do. Since it didn't work out... it isn't worth that you suffering for it.
He cheated you. He exchanged you for an other person. Things that happened should happen. It isn't great but finally you got the truth. Maybe he changed. Maybe he was like this from the beginning. You can't know that but it also doesn't matter. If it didn't happen with that woman... it would happen with an other.
So, try to change your mind.

Look there many other peoples and your young. It's not the end. You will find that person that fits you, that really loves you and that stays by your side. It could take some time. Some people could hurt you... that's life. You are learning it by doing it.

Be self confident. It was your first relationship. You learned a lot. It will help you to have a great relationship with Mr. Right.

Just think of it and please don't dump yourself. I have done this some time ago. It haven't helped myself.

(English is my third language, I'm sorry if it is quite incorrect)

Take some time to heal and rebuild. A mistake I see far too often is people right after a relationship jumping towards someone else as if it will fix everything. Give it time. Especially after a long-term relationship, give yourself some time and space to heal. Distract yourself with hobbies, work, friends, or even that shiny material thing you've been wanting for a while. Treat yourself and take care of yourself. Try to understand that it's not necessarily your fault, but perhaps what's happened will leave you in a better place to find someone else in the future, if you wish to do so.

I hope you feel better soon. Loss like this always hurts.

Nothing to say, but hopefully this will help. You'll get over it though.

Girl, you are in your 20s. Enjoy life. One man is not the end of the world and you have more important things to be doing for YOURSELF than worrying about some dude, You and him both are in a point in your lives where so much shit could still change about what you may or may not want that nothing you do for the next decade is set in stone. So don't try to make it that way. Sure this will sting for a while, there's literally nothing you can do about that but you CAN realize sooner rather than later that he wasn't shit, he didn't care about you like he should have, and you can find some one better. Simple as that.

Get your life where you want it to be first, THEN look for romance. IF you haven't found it by then.

In the meantime, revel in your prolific talent, use it to heal, channel that disappointment and regret and make something beautiful out of it. You'll live on and you don't need anyone else to validate that. You be well, now!

you're young, you're insanely talented, don't let one guy ruin your life!! your first relationship ending in hearbreak IS hard. And it's completely fine and normal to feel how you do right now!! It'll take a while to get used to not having them in your life but it is for the better, especially if he is unfaithful and a cheater. You just keep looking out for YOU, and keep bettering yourself. That is one relationship out of many, both romantic and platonic, but it won't define your life. Go out, meet new friends, don't look for romance, just take time to heal. People change, especially in their 20's, and you're gonna have to face that some people are going to drift from you, even if you don't want them to!
that said, i'm sorry to hear, and i hope you start feeling better soon.

I know this is 3 months old but I hope you're doing well, or have made some big steps to recovery. I can definitely see your talent, as well as the emotions within just about every piece, old or recent.

Stay strong, no matter how many obstacles come your way!

You will move on you will meet and date others till one day you will meet someone that's a perfect fit for you

Hope youre doing much better from this.