Gay bestfriend fallout?

[Ofoceansbeaches]

Ever since I had a relationship, my gay bestfriend has been acting sad, jealous and told my other friends I had no time. When i asked him if we had a problem, he said no. It's been two months, i gave him time but whenever I message him to hang out just the two of us like we used to, he is no longer comfortable hanging out with me alone whereas before we used to hangout alone. One time, when i tried to invite him, he said he is going to date with a guy but when my other friend invited, he said he can go and will cancel the date. I ofcourse miss the times we hang out cause he knows me so well and i him. Our dynamic was so smooth sailing prior to him becoming weird. Is there a way I can still save this? He does not tell the truth when i confront him and he evades the issue. Tells me there's no problem ( when i know there is)

[Guy13]

Totally normal.