in love with my Bestfriend

Cieyanna
Hey Girls! Let me tell you about my Bestfriend. I met HIM around 5 years ago on Instagram. I was in the 7th grade so I was young. We lived 25 miles from each other and I knew my mom wouldn't let me see him. So we decided to be friends. We have been video chatting for the last 4 years and I also seemed to find him attractive. He's litterally been there for me as I shed tears, laughs , and life experience via FaceTime and Skype. 
With that being said he was there for my relationships with other people
After 4 years of friendship, I helped him ask out a girl he liked. Fast forward to now and they are still together (making it a year)
This year is the first time I met him considering I moved and he now lives 5-10 minutes away from me. 
When we met, it was like those video chat conversations. We acted as if we were around more than you would have thought. 
I started to get butterflies and feelings when he would talk to me about how I deserve a guy who is going to love me like he does and see the value and beauty of me like him. That's when I realized I'm in love with. 
But he has a girlfriend... HELP!