Help!?!

Okay so I just met this guy, He’s 30 years old & im 21 I just got out of a toxic relationship and this guy I met has been the picture perfect guy. He’s very clear up about everything! So here’s the situation he has two other girls he’s also seeing 😐 he’s been seeing them both for 13 years and he says he wants to be with me as well. I have never been put in this type of situation mind you the other women are okay with this we all know about each other. It’s just really weird for me knowing about them but I’m really into this guy & he’s the second person I ever slept with other than my ex. He’s so perfect and sweet and affectionate but I’m scared to get too close cause I really don’t want to get hurt again but I just can’t seem to stay away from him 😩 any opinions !?!