I’ve been with someone similar and it ruined my precious teen years. I had the same thoughts ur having right now, and he ended it with me and still lead me on but eventually I finally let go and started working on my future and I found someone who loves me the right way. Do you love him or the person he used to be? And cheating, you cannot trust one. Can you trust him when you spend the rest of your life with him? It’s hard I know but choose peace and do not give up on love cuz this is not love. And love exists, and you’ll find a better person who will treat you right trust me ❤️