When a guy likes, he calls, he goes on dates with you. If you are on your 7th date, he likes you. Relax. How much he likes you is to be determined. It is a more attractive quality to be happy, relaxed, and enjoy your time with him than to be worried, needy, and asking him how he feels. So, I say just be careful enough that you don't let someone take advantage of you, but relaxed enough that you have a good time.