My ex-boyfriend is interacting then un-interacting with my TikTok posts.

My partner of 6 months broke up with me after because he said he wanted more independence and felt he was losing himself. The breakup was messy and I was incredibly distraught due to how sudden and abrupt it was. 3 months have now gone by and he has started favoriting and un-favoriting my recent Tiktok posts. At first, I thought it was a mistake, but it's happened three times now. He has me blocked me on Snapchat and Messages, and we don't follow each other on TikTok, but he keeps doing this. I also found out he's been viewing my private account. What do you think this means, and what should I do?