He could, but the only thing that makes me think he likes you is that another colleague confirmed that, if they talked and he admitted that to him. That is a direct confirmation from "him".
But if you just asked your other male colleague a personal opinion about this, and they did not talk before about you, then it's another story.
For sure spending effort in talking is usually a sign of interest but it can be just "social" interest, if you are an interesting person to talk with. Perhaps he is a friendly, talkative person, or maybe he is currently "alone" from a while and needed to finally have a good talk with someone. If you are able to send paragraphs it might mean you have content and you're an interesting conversator.
So before being able to tell I think you should wait for a while and observe if he keeps enjoying that a lot, and feels some "belonging" to you. If yes then chances he is romantically interested increase. And increase in general: even in case he is just "socially" interested to conversate, if he keeps doing that and you keep responding with the same effort, this increases the chances he will develop feelings later, anyway.
An indicator to understand what he might think now, could be to get to know how he communicates, usually, with his other friends. Is he very talkative and insightful? If yes, then it's just his norm. If he is very shy and introvert, then the effort he is putting in talking much to you "matters".
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I think he is into you.
He seems to be interested.
Doesn't sound like it.
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