Is this guy interested in me as well?

There's this guy I'm interested in but I'm not sure if he's interested in me as well.

Usually he doesn't initiate conversation with me but one day out of the blue he said he was getting coffee and asked if I needed anything. I asked to join him on the coffee run instead.

While we were waiting for coffee, we spoke a bit. He was engaged in the conversation but seemed a little tense the whole time. But he did conclude on "nice chatting with you."

Now a few days later he's gone to not talking to me again.

Is this guy interested in me as well?
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