Most Helpful Guy
Just continue as normal until the conversation comes up again and you can ask him what he really thinks.
Most Helpful Girl
At least he was honest with you. It may hurt but you cannot change who a person loves. It may not seem like it but you will get over it. Why love someone whos heart is somewhere else? Besides, he was single for only 4 months before he started dating you- that is surely not enough time to get over a failed engagement. I am sorry but you might of been the rebound. You have to move on or give him time to figure out what he wants no matter how painful it is because this pain is short lived compared to the pain still being involved with someone and chasing someone who loves someone else.