tryingsome Lastly, you mention 5 1/2 years with your BPDx (were you married?), [... .] How did things end? [... .]
It wasn't a relationship I really wanted to be in, it was kind of antagonist from the beginning. She became pregnant 3 months in, and I was determined to make it work or at least put my best foot forward. The last year was tough.
Pregnancy in a relationship (I'm guessing before marriage) seems really tough to go through as a guy--there's a lot of questions about responsibility. Well done on seeing you were determined to make it work and put your best foot forward.
Anyhow, what gets me now is the whisper
I think this is a good place to look first. Sometimes things nag us--they can be a way of us trying to communicate with ourselves.
... .
Granted, I have always been comfortable being alone. More FOO there I believe.
OK.
Second, you cite to your first 13-year r/s (were you married?) which you ended apparently, for unspecified reasons involving your FOO or fears. What FOO issues? What fears? 13 years is a long time.
We met in college. [... .]
But I am at a good place with that relationship and so is she.
OK. I noticed you didn't bring up the FOO issues.
But now I think you're getting somewhere;
I feel I am detached on a mental level-- just some weird thing in the last 6 months emotionally I can't pin down. It is like I want her to love me fully unlike my mother.
I think it has to do with my mother--a lot of the same patterns.
[sister and tryingsome] often put in the middle to choose sides. I was very peace-keeper oriented back then.
Maybe you're looking for the affection, safety, and support that you didn't feel you received when you were younger. Some children don't have to so often play peacekeeper. Some children are allowed to play without a violent environment.

Sometimes things that happen when we're 0-15 years old can come up at ages 20-70. If that's true for you then I want to share that I think it's OK.

I have come a long way since then and have some pretty good boundaries. ... .
On the plus side, there are children that embroil in a conflict into their adult lives. You seem well away from that and there are some boundaries there.

... .I can tell when she is having problems with her boyfriend or in life.
Recall that it's often easier for people to pick up emotional cues of a BPex--usually because of heightened empathy or enmeshment. While this makes you more vulnerable to entanglement, I think it's also
a good thing after detachment because you're probably not on the dull end of sensitivity.

She reaches out. ... .
I think I was cognizant enough to back away ... .
It's like a constant tide.
She reaches out ... .
Grasping a hand that reaches out is
your choice. You don't
always have to take it.
I'm getting the feeling that you're going through quite a lot of issues right now. What really helps is to have self care, a support network, or a T. Have you got at least one of these?