Are these red flags?

[Magicpaint]

Hi everyone
I've been on a course for two weeks. There was a guy on there who was called Chris. He asked for my number and after giving it to him he rang my phone so I would have his. He said put my name as Ryan as that's my real name. He messages then he stops and doesn't reply until 2/3 hours later. Not all the time but some of the time. Are these red flags. I don't get the name change?

Its so if you ring and his gf picks up he can say you got the wrong number as he's not Ryan.

Yes. It is so that he can hide his messages and deny it is him if you ever accidentally or deliberately rat him out to his wife. I think you know this though right?

You absolutely do not need this now. delete his number.

Thank you very much blocking his number