Girlfriend wearing revealing clothes to concert/party

So my girlfriend likes to wear things like belly shirt (or whatever the term is) to concerts and parties (she has sizeable boobs) and I don't particularly like them (the shirts). I never say anything because its her choice not mine, but she recently asked what I prefer I hinted at it, but she has very low self esteem. So after a bit of talking, she went into this self destruct mode, saying that I hate EVERYTHING she wears and that its not a turn on to wear revealing stuff.

All I said was I like having guys be jealous, but that it can cross the line when its constant with guys wanting to hook up and makes me uncomfortable and like I'm competing for her. Is that so bad? I just don't think she should have to reveal her stomach/wear low cut shirts just so she thinks I can show her off? She deserves more respect, and to be honest, when I see girls who wear a lot of revealing stuff, I think she's single, like its an invitation to attract guys

What do I do now, she's upset and I can't fix it now
Girlfriend wearing revealing clothes to concert/party
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