Damn.
The needines just drips off the OPs poster.
If you're needy for the girl's attention and validation, it won't feel as "intoxicating" to be around her than if you're just enjoying your time spent together. Take the relationship one day at a time, not worrying about whether you're looking at other girls.
When I'm with a girl, I look at other girls. It's just kinda assumed and totally cool. Just be fine with it. If you want to look, look. It's funny

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