I find your opening post a bit heterocentric Wild, but that as a side note
I'm 29 and I have had two LTRs in my life. The second one ended about two years ago and lasted about six years, five of which we also lived together. That relationship was quite 'irregular', but that's a story for another day. As a result, my ex and I have remained very good friends. Either way, cross-dressing hardly played any role in that relationship and certainly wasn't the reason it ended. I only started to take cross-dressing much more seriously after the relationship ended in the first place, which probably plays into that little theory of yours.
I'm not actively looking for any kind of relationship. It's not that I'm scared of 'failing' it again, I just don't think I want that kind of commitment right now, both emotionally and practically. I'm pretty happy where I'm at, I'm not in dire need of kids, mortgages or another set of 'in-laws'. If I ever meet someone as crazy as me, I might give it a try.
By the way, I do think I know WHY I dress, but I'd be happy to hear your analysis.
