Responding to a compliment like this from a male close friend can be handled with grace and appreciation. Here's a polite and friendly way to reply:
"Thank you so much for the kind words! I really appreciate your compliment and it means a lot to me. I'm glad you like the pictures. You're such a great friend!"
This response acknowledges the compliment, expresses gratitude, and emphasizes the value of your friendship. It keeps the conversation friendly and light without necessarily indicating any romantic interest if you wish to maintain a platonic relationship with your friend.