MIKAELA, exactly what is it you love about this guy? He makes you laugh? Gives you a good massage? Sings you to sleep? Do you still remember exactly why you love him? Be truthful, is that reason still around? Or he has changed, you hardly see it in him nowadays. Sometimes, MIKAELA, we get stuck on happier times that unfortunately are now just memories. You cannot live in The Past, that is why they say: "Live in the Moment" di ba.
IF he keeps on bringing the 2 of you to that place in The Past when you were dis-connected and you struck his ego a blow with your MU ... Such a blow he has not survived that is why his ego cannot feel victorious now the 2 of you are together -- he appears to be trying to make YOU suffer for HIS emotional baggage. That recurring 3rd Party - ano yan, tit for tat?
MIKAELA, you know what a Mother's Love is. Generally, it has no vested interests nor selfish agenda. A mother wants her child, at whatever age - feeling happy, secure and optimistic. IF you were the mom of yourself/MIKAELA911 - are you gonna be happy with the state of affairs MIKAELA is in now? Are you gonna tell her: oo, hija, go on hoping and hoping at baka magbago pa yan & bumalik kayo as to how you were before The Past He Dislikes & Refuses to Put Behind happened?
There are many things in this life to nag about, to be obsessive about, to rage against -- sure. BUT what labels the nagging/obsessing/raging as an exercise in futility is - can it CHANGE the situation/circumstances? So, MIKAELA, whatever you do short of jumping into the Pasig

River daily, plus whatever he does short of screwing every girl between Pandacan and Cainta -- can all that circus CHANGE THE PAST? Therein lies your answer as to what you must do to serve YOUR best interests. What you mut do to be happy, feeling secure, and being optimistic.
MIKAELA, it is only you yourself that can take best care of yourself. The Truth will set you free, so face it. Either you cut your losses, and move out of this relationship; or accept that this relationship, with its heartbreaks/hurts/disappointments is worth it and makes you happy. It does not matter how the world views this relationship, the only thing that matters is -- will you regret staying longer in it one day? Alam mo na sagot dyan at this time.
Take care of yourself, Sis.