I told a guy that I was interested in him and he said that he isn’t looking for a relationship at the moment. what does he mean?

we have been texting for a while now and said that he liked me. we still text and he is very flirty but I don't know what he wants. he gets jealous when i’m with any other guy too

I told a guy that I was interested in him and he said that he isn’t looking for a relationship at the moment. what does he mean?
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