Am I being desperate?

Whenever a guy flirts with me or compliment me I tend to smile a lot after or throughout the rest of the day. I’m not sure why. One of my long time older guy friend notices it and gets annoyed. I will be smiling and he says I’m smiling too much and other people are going to look at me crazy and wonder why I’m smiling like that. He thinks that when I get some kind of male attention I switch up and become desperate but I’m just happy. Any time I talk about another guy he makes me feel guilty for crushing on a guy but when he was my age he bragged about how many girls he slept with.

Am I being desperate?
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