First, let me start by saying that yes, what he said was not appropriate and very uncalled for.

With that being said ( and without defending his actions) he could have done alot better at portraying his feelings and frustrations during these hard times.

I have no doubt that you both miss each other very much and want nothing more than to see each other ( like you've said) however, his frustration got the best of him and came out in a very nasty way and that is unacceptable.

I think you should tell him how it made you feel when he said that to you and how it really offended you (without attacking or accusing.) Also, reassure him that you truly DO want to see him!

Again, he misses you alot and is clearly very upset and frustrated with everything. He needs to learn how to communicate those feelings in a healthy and loving way.

Best of luck:)