How to call him out on his bullshit in a nice way?

Anonymous
We went on 4 dates. Always initiated. Even asked me out for NYE, but I had a vacation planned. I told him I’d be free to see him when I get back. His texting dropped slightly. We still talked when I came back and discussed meeting up one weekend. I decided to not invest so much in a text back to him to see if he would pick up the conversation again and he never did. 4 days later I reached out asking him if we are still on since I haven’t heard from him. That’s when he proceeded to tell me he never got a text from me and thought I ghosted him and that I wasn’t interested and went back on dating app and connected with someone else and asked to be friends. It’s been about only 3 weeks since things ended and he ended up reaching out to me again. I decided to answer and give him another chance because he is now basically interested again. He said to me in text that he learned a lesson not to put his eggs in 1 basket because he did that with me and thought I wasn’t interested and got hurt and then with this other girl he saw another side of her that was a major turn off and that he is going to just take things as they come and not wear his heart on his sleeve. I told him we can talk about that in person. It seems like a lie because the time between me texting him asking if we are still on and him meeting another girl is small so the odds are he was talking to another girl before. I bet this girl ended it with him and now turns to a safe option. I think it’s possible that he felt I wasn’t interested and felt the need to go on app because I never offered to come to him and I also didn't texts back till several hours later. Because of my lack of investment he wanted to pull away to not get hurt is possible. I still like him and want to give it a chance, but I feel like I need to call him out on the bullshit. First, I will see what he says , but if I think he is lying what should I say that comes across as not bitchy but at the same time calling him out?
How to call him out on his bullshit in a nice way?
4 Opinion