I can empathise with that feeling, deep_techno.
I think the idea of finding out why she scores well is a great idea.
Apart from that, your idea about the Venn diagram is excellent. I mean, if nothing else, all you gotta do is look after yourself at the end of the day & it sounds like there's an imbalance there.
The Venn diagram thing sounds like you're going to start looking at yourself as being on the same team, so to speak, as her which might tip the balance so you don't feel as bad!
That's probably important.
Personally, I like visualisations and using them in goal setting. I also like self-esteem CDs and affirmation CDs. I'm sure they're not everyone's cup of tea, but, hey - we've all got to do what works for us & optimises us. ![Smile :)](./images/smilies/icon_smile.gif)
_________________
.. one day
in murky water mild,
where Wednesday lay
A Thursday child ..