Relationship advice about a guy who's a "flip-flopper"?

He was one of those guys who didn’t want a relationship but wanted everything else, and in my mind he can’t have his cake and eat it too so of course I didn’t go with this plan. He told me he was interested in me but then about a few weeks later confessed he was still in love with his ex. I stopped talking to him about a month after due to us not seeing eye to eye on what we both wanted

So, after not talking for a while, he texted me a few days ago saying he’s now ready for a stable relationship with me and he’s missed me; all that good jazz. But if he wants to be with me (or at least says he does) and he said he missed me, why doesn’t he treat me kinder? He tells me all my ideas suck, and he thinks the whole world is out to get him. Believe me, he’s nice and all, but he’s not acting like he wants a relationship.

Should I try out a relationship and tell him it’s not working? Or should I keep it as friends? It’s hard for me to be with someone who can’t make up their mind and leads me on

….and thank you for reading that novel (: