What can hold a girls interest in guys?

22 year old Virgin here. Sagittarius/Capricorn. I've been told I was attractive but I really hate my voice.

I hate the prolonged pain of heartbreak every time a girl I like starts to lose interest in me as a person. In an effort to avoid that feeling I've been sharing less and less of my feelings and emotions towards each girl so it won't hurt as much in the probable scenario she gains more interest for a guy she barely knew for a short period of time.

Feels like the more effort I put in the harder it slaps me in the face. I've been stood up twice recently by girls whove found boyfriends days before we were planning go out.
What can hold a girls interest in guys?
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