If he's putting less and less effort into the relationship, chances are he's less and less interested.

It's a good idea that you have a break now. You will both have time to reflect on this relationship without each other's influence. This way, you can approach the relationship more objective.

Instead of worrying about how he feels, worry about how you feel about him first. Figure out what you want in this relationship and when we're ready to talk to each other again, let each other know what you expect.

If you can't provide each other what you want, then this relationship is going to end sooner or later.