He stops texting halfway?

So I've been chatting with this guy, and for some reason he keeps leaving me hanging. I thought he wasn't interested the first couple of times, and I didn't want to be some burden to him, but that's not it either. I give him space and it's he who tries getting me hooked to a conversation, and then as soon as I'm interested in the convo, he abruptly leaves in the middle- no explanation, no g2g text, nothing, he just leaves the convo despite still being online. This happens multiple times in almost every conversation.

He stops texting halfway?
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