What does he mean when he says he doesn't know how he feels about me?

Anonymous
So there's this guy I like he's my ex and I still have feelings for him. I hinted him that I like him so that he could know. I thought he liked me because he'll be saying nice things to me and we'll be flirting. But then the reason I thought he didn't was because supposedly we are friends with benefits but we never did anything really.So one day my friend went up to him and told him you do know she still has feelings for you right and he nodded but didn't say anything else. She then asked him how he feels about me and he stayed quiet and didn't say anything for a moment and then lunch ended and he started to walk away and said I'll explain later. She saw him later and asked him what he had to explain but he said ill explain tomorrow. Tomorrow came and he didn't say anything. So later tht day I text him and told him I know what my friend did and he acted like if he didn't know and changed the topic. The next day my friend called him and he was making an excuse to not tell her but at the end he just said I don't know how I feel about her. So does he like or not?
What does he mean when he says he doesn't know how he feels about me?
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