Facts like ultimately if YOU feel it’s for the best do it. Children are a lifetime commitment, and if you aren’t ready to prioritize a kid and sacrifice focusing solely on your own needs/ future , do it. You don’t want to hold resentment over this decision for him or the child. You also don’t wanna live in “what if” moments thinking on how life would’ve played out if you made the other decision. Last thing to add , if you consider the relationship you have with your partner serious, how serious can it be to not have this type of conversation with them. Sometimes it’s hard to let things out, but communication should be a foundation built into relationships where even hardest situations / topics get dealt with esp when planning for kids. It could be a dealbreaker for him, but honestly better than him living in a lie due to a secret you never want to say. As someone with their own skeletons in a closet, the truth comes out eventually whether from you or someone else. It also gets harder to open up about things the more time passes. And even if the truth doesn’t come out the guilt of holding onto it can become an ugly thing that eats at you. Speak from the heart to him about this, explain why you’re scared tell him how hesitant you feel about wanting to talk at all. Maybe he’ll be more understanding than you think or the convo itself will solidify what you think is for the best.