Gay dating advice please

I am a gay man, almost 30 years old, a full-time postgraduate student. I have had a few real dates in my life (I mean, spending time to get to know my date, so I'm not counting sexual encounters). Unfortunately all of them were much older men, as people my age are mostly interested in non-strings sex. And those who were looking for relationships were not interested in me. :( I thought the problem with me was that I was fat. And I was right. I've managed to kill fat and build up muscles. Now I find myself pretty attractive, and a lot of guys show interest in me and engaged in long conversations. But rather than feeling happy, somehow I feel sad. I am the same person as before, save physique. I don't want my body to be my selling point, you know what I mean? This weekend I'm going to date a guy around my age.. for the first time in my life. He keeps saying (via Internet chat, texts, etc) that I'm hot. Somehow I'm not comfortable with his complement, however sincere (due to the reason given above). I have seen a lot of guys who like showing off their muscles and love to be complemented. But I'm not one of them. However, telling this guy to stop complementing me is not a nice thing to do (If I give someone sincere complements, I would hurt if they ask me to stop too). And telling him my history is like implying that he's not deep. Am I being really nervous or overthinking? Despite my new physique I don't gain confidence at all. :( Thank you so much for reading this. Advice please?

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