Should I give up?

So there is a guy I like and we have been on a few dates. We have been chatting a lot over the phone and on Skype. Recenlty he has stopped answering the phone sometimes when I call whereas before he ALWAYS used to answer.

Then this morning I texted him saying I was going to go shopping today to find something nice to wear for him and his reply was…. “K”

Does this mean I should basically give up?