Best friends crush may like me

Mi

Right so basically I have a best friend and I would never want to hurt her feelings. She got really close with this guy for the past year but has never pursued him, just watched from a distance. I now decide that I should be friends with him to support her. The other day, we were all hanging out and they had all left except for me. Turns out, the crush didn’t leave and ran into me later. I SWEAR when he saw me his face lit up and his eyes went bigger but I feel like that might be me overthinking things. He then asked my best friend for my number and now we’re playing iMessage games with each other, but I’m keeping it very friendly. I feel like if this continues, we will start to catch feelings for each other, or at least I will. HES A GOOD GUY so I don’t want to completely cut him off, but I don’t want to break my best friends heart either.