To be fair, perhaps you already are, and as you say, communication isn't your forte. But what do I do? I only know what I know. I don't guess and I don't conjecture and I don't assume.
Here's what you need to know. Abrupt...is not me. Uncommunicative...is not me. Dismissive...is not me. I don't assume you care if you choose to say nothing. I don't assume you have understood if you indicate nothing to that effect. I don't assume you can deal with me if you don't show it. More importantly, I don't assume you'd want to deal with me if you don't convince me.