My boyfriend just cheated and I think I might give him a second chance

We’ve been together a year and I’m so broken. I told him not only does he have to win back my trust, but also win the second chance. I love him so fucking much and I want to continue this relationship so badly. I’m worried I might be making a wrong decision? I’m so confused and I just don’t know

Update// thank you to everyone who gave me real sincere advice instead of just saying “once a cheater always a cheater”. The main reason I’m considering giving him a second chance is because I watched what happened with my Nana and Papa. After 30 years of marriage my Papa had an affair and my Nana gave him a second chance and now 10 years later their relationship is stronger than ever. I’m the type of person who is very determined and wants to make everything work out. I think if I didn’t try and make this work and forgive him that I would just feel like crap for giving up. I know it’s not my fault that this happened, he has 100% took blame he didn’t try and make it seem like it was because I was doing something wrong. He says he’s ready to be in the relationship and be completely honest. He wrote me a hand written letter (which he’s never done because he hates writing, so it was clear he was pretty serious). I know that in the future if it happens again it’s still not my fault and I need to leave him, but at least I’ll know that I tried and didn’t give up on this. Again, thank you to everyone who gave me advice, although I used mostly advice from my mom and Nana. 💛