It's a short interaction that you share and it's left open to interpretation. This is only speculation but he may be attracted to you. "Probably more welcome than you would like" could be seen as having a hidden meaning that is directed at finding out how welcome he really is in your life. In English sentences, double meanings, double entendre, subliminal messages are examples of meanings behind the meanings. For example, if I say to someone: "you probably don't want me to come to your party" and then he or she responds "oh yes, yes I do" then I have found a way to get my answer without feeling embarrassed or rejected.