He may need a little time to adjust to the situation you two are in, if it’s a long-distance thing, then he’s going to need space and time to think about everything. This doesn’t mean start ignoring his calls or stop texting him back, you should simply realize he may need space. Just because he wants some space also doesn’t mean he doesn’t miss you, sometimes change is a huge thing and people deal with it in different ways. Giving him space will allow him to realize how much he loves and misses you, this is likely to lead to a discussion between the two of you about your feelings.
If you’re really worried that your ex is going to get into a new relationship, or you know he’s in one and you want to find out whether it’s real or not, this article will give you the signs that his new relationship is a rebound. That way, you can get a definitive answer to the question, “Is he in a rebound relationship?” and move on with putting the no contact rule to work for you.