He actively send me snaps and occasionally text me and now he often leave me on read when I replied?

We have been snapchatting and texting for two months till now but lately he just often leave me on read. Maybe for a few times he might replied but mostly he don’t. Today I have sent him some messages to tease him, saw him typing then stopped, then leave me on read again. I would like to why he act like this?

He actively send me snaps and occasionally text me and now he often leave me on read when I replied?
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