I basically purged my wardrobe - it was a long time coming. I picked up new clothes for work and life (my style is very street urban wear). And I did it for me and my own sense of style, not for her.
I feel awesome every day just from dressing exactly how I want to and looking supa' fly. My professional gear is also unique and it makes me feel very confident at work every day too now. I also picked up a cologne that I haven't in many years, but I've always really liked.
So, do that. It is a small thing but it will give you a good confidence boost.
Now I am just working to lose some more weight and so the clothes will look even better. Get a new haircut. Change up your appearance to what makes you feel good. I also shaved my beard and going clean shaven - which makes me look a lot younger and I am liking it. I will grow it out in winter, but I am going to take good care of it so I look good.
I know other women have noticed - which also has boosted confidence.