Men. What makes you take a woman seriously?

How should I approach a guy that’s seemingly giving bare minimum?

So I’ve been talking to this guy since November and at first, he was so interested in getting to know me etc. However, since February he started reaching out to me just to ignore me for the chunk of the day. It would be nice if I could chalk it up to “he’s busy” but he’s chronically online as I’m waiting for responses to conversation that he starts with me. I also reach out to him and express my interest so it’s not like he’s doing a majority of the initiating. But it’s very frustrating that he reaches out to me or I’m reaching out to him just for the conversation to not move a needle. He lives out of state and I have already bought tickets to fly to him since we both expressed the want to see each other again. ( I’ve met him in person but he moved away some years ago). Please let me know how I should approach it the next time he asks me “how’s my day going” (his usual opening line) I have attached what I felt reasonable to express. Let me know if I should change it because I’ve been working hard on not being a bitch when my feelings are hurt, but being nice all the time makes me feel like a doormat.

Here’s what I want to say: “Honestly I’ve been a bit irritated with you. To have you reach out to me or I reach out to you and either be ignored for a good chunk of the day or given bare minimum conversation is such a shit feeling. So I do not feel like talking today because I will be a bitch and I don’t feel like being frustrated. I’m nice, but I’m not a fucking doormat. And if there are times where you simply don’t want to talk then just say that because I respect that more than feeling like I’m being ignored or that you have little interest in speaking to me how I wish to speak to you. “