Have Relationship Questions? Ask a Counselor for Answers ASAP
What is of importance here is how long the two of you had been dating and if this had taken place in the past where you had told him that you loved him and he did not reactly badly.
If he had never done something like this it makes sense that you are concerned. If he is not replying to email or texting see if you may find out from some of your mutual friends what is going on with him.