<human>: Give me a shortened version of the text

I [21m] have been dating my girlfriend [19f] for almost four years and have been happy with her.  However, I am coming to grips with the fact that I will always have feelings for my best friend [21f] that I have known since we were 4 years old.  I've been in love with her my whole life.  The other night we (me and 21f) went to the bar, had some drinks, danced, and sang for hours.  We had a great time and plan on going again tonight.  She has always referred to me as her best friend but I have spent my whole life wanting to be more.  All of this raises many questions in my mind.  Does she have feelings for me that she doesn't want to admit because I'm with someone else? Should I even be in the relationship I'm in? Also, any general advice would be helpful.
<bot>: In a relationship with [19f] but have real feelings for best friend [21f].  Don't know how to handle situation.