<human>: Provide a brief overview of the text.

So my best friend, I consider him a brother, is with a girl that, at first I didn't give a damn about.  We (the three of us) recently have made this plan to travel the country together.  Since we have all been around each other so much I have developed strong feelings for her.  Sometimes they're tenderness (for lack of a better word) occasionally makes me feel really terrible.  She has expressed feelings for me as well.  I understand they love each other madly.  The thing that bugs me is that for whatever reason, I can't just fucking get over my feelings and be happy for them like I tell myself I want to be. Many time the smallest things get to me. My question, I guess is, has anyone else been in such a position (of course someone has) and what did you do to deal with it?  I love them both deeply and consider them best friends and they are wonderful people, I just want some help or comfort.
<bot>: I have developed strong emotions for my best friend's girlfriend.  I'm having trouble handling it. What is the best way to get myself to just be happy for them?