Hello, new to this group 

So it's been a good few months since my diagnosis 
I'm suppose to be talking more about it my next session. 
But I was curious if this happens to other people with bpd

Like when your in a relationship but something triggers you and your feelings for this person seem to disappear and you feel numb and unhappy. Almost like your dead and you have no idea what your doing with this person. but they didnt do anything wrong and then when you leave or attempt to be alone you want them back so badly and are convinced you love them. Which causes some of the relationships to become on and off. How do I avoid this? It's like all the sudden i just feel empty

I'm starting a new relationship or atleast I'm trying to with someone i been talking to on tinder so far things are going pretty smoothly but I think my biggest fear is that I will start to feel that numbness or emptiness when I'm with them. I just want to be in a happy healthy relationship this is my first one since an abusive narcissistic one that happened 2 years ago. 

Any advice?