I hate this

My first boyfriend used me. I lost a lot to him. And now I'm starting to think my last (second) boyfriend was using me too, though in a different way. I could only convince myself he wasn't because he wanted to remain friends after and i feel like we've been good. We had talked about seeing eachother again soon. But the last few days he's made flirtatious comments and i remained platonic and i feel like it's made him quieter

Today he told me he missed me and i said we need to see eachother again as friends. He didn't text me all day until i reached out and he wasn't acting like himself. I feel like I'm going to get an ultimatum