Should I tell my crush how I feel if we haven’t talked in a while?

So my crush and I met back in January when he was in town for a few weeks (he lives 10 hours away). He was super into me and we went out a lot that week, but eventually he had to go back. We started off keeping in touch but things fizzled out, and we haven’t talked in 1 month. Is it worth it to tell him how I feel at this point? I know it’s unrealistic that anything would happen but I don’t want to have regrets later down the road.
Should I tell my crush how I feel if we haven’t talked in a while?
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