It’s very difficult to do this if he is refusing to communicate with you.

I take it from message that you don’t live together?

I think you need to give him chance to cool down a bit. He has obviously acted somewhat rashly in removing you from his Facebook. It seems to me that he is acting out his frustrations and that maybe he needs a little bit of space.

The best thing to do I think is to remain calm and don’t say anything out of anxiety or anger that you may regret later.

You could let him know that you love him and that you are there for him and that you would like to talk, when he is ready.

When this current tense situation has blown over, perhaps you could encourage him to attend relationship counseling with you? Or if he doesn’t like this idea, ask him calmly and kindly what he wants. Let him speak, give him a safe environment to say how he feels and genuinely listen with as little judgement as you can.

I hope you can resolve this situation.