Trust issues with girlfriend? Need advice?

My girlfriend and I were best friends about 5-6 months before we started dating and have been officially together for 1 year and a month. We are both 17 - don't think age should be much of an issue, I'd prefer not to get a "more fish in the sea" kind of response. We love each other and are in a... Show More

Cont'd: ...every other day(s). I told her that she needs to stop flirting so much - she told me she will. It's hard for me to trust that with past experiences with other guys she has met. I try to give her attention so she know I lover her so much. Thanks