I only seem to be able to go 6-8 months in a relationship before I stop idealizing someone and feel like I no longer need them. This is a pattern I recognize is tied to my BPD... I will feel passionately in love with my S.O and suddenly feel the need to push them away, sometimes for no reason at all. 

This is in addition to splitting throughout the beginning of the relationship, over small arguments, or minor things they say that will set me off. I normally just take time to myself to let these temporary feelings of anger and desperation/sadness pass. 

I am in a really good relationship right now and am at this point. At what point do you experience this type of splitting, the make it or break it point - how do you handle it? 

I know this person loves me very much, treats me amazing, and is so patient with me, but I am struggling with self-sabotaging. I don't want to ruin a good thing. I think they are also beginning to sense this, and are becoming a bit clingy and over assuring which is causing me to push further away... 