I’m in love with my best friend...who has a boyfriend?

So, I have had this best friend for a really long time. Oh my god, he is amazing. He is trans and I’ve loved him even before he came out. I’m bi, he’s bi, it’s chill. I’ve always had a bit of a romance with him, but lately it’s been getting really intense. I always think about him and when we are together, I can’t help but always be by his side.

Here comes the problem. He has a boyfriend? A long distance one. I know y’all are gonna be like “dOnT dO It, rEsPecT hIs ReLatIonshIp.” And I don’t need to hear that because I love him, and his boyfriend too much to do anything to get in their way. I just need advice on how to put my feelings on hold. He makes my heart race. He is my favourite person in the entire world. Help.