Why he keeps asking me out to have breakfast with him?

I once posted a photo of my favourite dish on whatsapp and since then he has been asking me everyday to take him out for breakfast. Initially i lied saying i have lots of work to do..he knew i was lying..at last i agreed thinking it is just a breakfast..2 days ago he came at my desk and kept his hand on my shoulder for like 5 secs or so.. he has been very good to me as I perform really well at my workplace...but I am kinda conservative person who never went out with a guy alone..i said yes to him but dunno how will i face this anxiety...is he acting like this cuz he has some plan..or bcuz he is an inquisitive virgo? Do virgos touch a lot?