First one night stand?

So I just got divorced after 11 years of marriage and went out to celebrate. I’m free and happy! I met a guy and I was pretty drunk and gave him my number. He seems like a really great guy and I was drawn to him. Also there’s this other guy that we have basically been planning on dating. His ex finally moved out, my divorce was finalized. And I assumed he was enjoying being single for a bit before getting serious with me. I will never ask if he fooled around, it’s not my business. We seriously are planning kids, before my divorce was final. Back to the guy I met at the bar. A week later, he invites me over. I told him straight, that hes not going to get lucky. But two light beers later, and good conversations, we kissed and stripped and dry humped like we were in high school. He asked if I wanted to go to his room. I gave in. We had sex like 6 times! I honestly didn’t know men existed like that. It was amazing! I went home and slept as much as I could. The next day, the guy I’ve been waiting on getting serious with actually confesses his love for me. I knew he really liked me, but not that level, when we are still getting to know each other better after being semi friends for years. I really do love him too, and feel horrible about the night before. I think most of why I did it was because I needed validation after my divorce that I could even be attractive to other men, without really knowing me and I’m not an attention seeker. But to me this seems like thats exactly what it was. I don’t expect that guy to text me back, and if he does, I’ll break it to him, we can’t see each other. But I can’t tell my now boyfriend. And I’m generally an honest caring and loyal person so it’s tearing me up inside. Anyways, please help! Am I okay to talk myself into forgiving me for this? I’m losing sleep and all that. I’ve seriously never done anything even remotely like this. And let lose for the first time without my ex.