We've dated for 3 weeks and he said I love you?

We've talked for a long time, like 5 months. and we just started dating. Sometimes I feel like he's suffocating me. And last night he said I love you, I want to love him but I'm just not at that point yet. He talked about moving in together the other day since we're 45 minutes awy from each other. he even talked about having kids one day? I already have a 3 year old daughter at 21, I'm not ready to talk about a nother child more or less 3 weeks after dating?