How do you know he's the one.

I started dating again. He's older then my Ex and it's different because we talk about our kids And family and how much he seen the world and how I want to see the world. And i don't know if it's real because with my Ex it's was Like he lost intrest in me and what I thought was real never was. And with this new guy when he would text me he would say..good morning my love does that mean something like I love you. This new age of dating is so different to me. HELP