Most Helpful Girl
In my experience, apart from the obvious, common-sense stuff, the best way to show a man you love him if you're in a committed, long-term relationship is the following:
1. Don't talk to much (especially during sports, girl-talk is for girls).
2. Make him a sandwich once in while (meat, cheese, mayo, bread not hard).
3. Suck his dick 2-3 times a week (it's not "hard" and free protein supplement).
Do this and you will make most straight men (and probably a lot of Gay men) feel like kings. It really is that simple.