Is something going on between him and this girl please help me?

I could just be paranoid or overreacting but for some reason my partner is deleting conversations with this one specific girl on Instagram? This is like the 4th time he has done something with it he hasn’t done it with his other female friends but he keeps doing it with this one girl? I heard it’s mad suspicious if your partner keeps deleting messages between someone else of the opposite gender he also had feelinfs for this girl in the past bc he used to flirt with her in her comment section back than but it was before he knew me but he keeps deleting their messages? And she keeps stalking my page too? I recently broke up with him but me and him got back togheter she dm him saying “y’all got back togheter” she knows this bc she found out by stalking my page and she keeps stalking it consistently everyday? Am I just overreacting I’m sorry if I am because my ex cheated on me in the past and I’m just paranoid but my friend told me something suspicious is going on
Is something going on between him and this girl please help me?
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