Of course it's hard define what is 'you', and gets harder if we're talking about a theoretical case where the excact same atoms happen in the same configuration in a new universe 'cycle' etc, but the reality is this:

Even if it was 'you' (whatever 'you' means), reliving your life mulitple/infinite times, what difference does it make?

You're imagining it from the perspective of someone having to relive their life, but has memories of their older life (or lives)...this could be you 57,367th repeated life, and you wouldn't know it from your 1st or millionth, if it happened like that.