Relationship help! (First time mom)

If this is a bad section put this post in plz let me know. So I’m 17 my son is turning 5 months old this month and I go to school but at night so I have a whole new group of friends now. Nobody knows about my son really because In night school there isn’t much people there and people TALK so lol. Anyway theres a boy he likes me a lot and I’m starting to really like him (my child’s father left) but the thing is, Idk if I should tell him about my son yet… I remember when my baby was a newborn or so and I was talking to my mom I said “if I get in a relationship I’m not telling them about my baby until I know the relationships serious” she said it was a good idea BUT this boy also expects to see me sometime, though I really have no time to go out unless I’m taking my son with me. I’m nervous if I don’t see him he’ll start losing feelings. I just need help idk what to do. Also I’m not really focusing on boys but he’s a really good guy. He’s nice and caring, when he found out I got my period he gave my chocolate lol I thought that was sweet. I need advice though plzzzz💙

UPDATE: I’ve told him. I felt that the comments were right, I didn’t want to have a relationship with him without him knowing about my baby. Anyway he’s fine with it :) he said exactly this, “that’s fine, I just want you” I was so happy to hear those words come out of his mouth 🤩