Any single moms? Dating

So boyfriend was staying over here (I own my home) since summer started. Boys were with dad in another state for a few weeks. Well he’s still staying over. My kids love him and he’s so good to them. Treats me best ever had. But we aren’t married. Tonight we are going to talk. He texted today and asked if he was wearing his welcome out over here. He hasn’t moved in but hasn’t left in two months. Not sure how to react and what to do.... thanks.

I do want him here. But is it wrong? We aren’t married.