I’m torn between two girls

I 18M am talking to a very sweet girl she’s 18 F and we have been talking for a couple of weeks. Everything was going fine until a girl 19 F that I have had multiple talking stages with. Every time we have talked she has said that she’s not ready for a relationship and breaks my heart. I’m a very emotional person and I don’t know what to do. I feel a deep sadness and emotional pain when she says she misses me. She was my first true love and I can’t get over her, no matter how hard I try. It’s like my heart says yes and my brain says no and I’m torn apart because I seriously do love this girl but she’s hurt me so much in the past that idk if I really want that to happen again. Just to be clear the girl I’m currently talking to is very sweet and very biblical but we haven’t met each other in person yet as she lives 1 hour away from me. We know each other through mutual friends but that’s it. Idk what to do in this situation and I’m torn between yes and no. Please help me!!!

Edit: Thank you for the advice! I told my 19f ex that I wasn’t interested and blocked her on everything. I told the girl I’m currently talking about the situation and she was a little bit upset but then told me she understood where I was coming from and she accepted my apology. Once again thank you all for the advice it really opened my eyes to what I was doing wrong!