I'm my opinion I'd say he/she cares about you cuz you never know maybe that day you might have had a bad day and badly needed someone so I guess yes they have feelings for you because they thought of you
Well!!! It depends upon the friend with whom we are talking. If the friend is a girl then she would want to be close to us and also the boy too. But some friends may have strong feeling to know about us more and some may like us. So especially we can't say that our friend may have any kind of unnatural feeling for us at once!!