Do something unforgettable every time:
If you’re only seeing him once a week, or maybe less, you can’t just be going to the usual bar or restaurant. Show him that it is worth waiting to see you by doing something unique every time. Go ice-skating. Go bungee jumping. Rent fast cars to take out into the desert. Go to some outrageous restaurant like Hawaiian Tropic Zone and join the bikini beauty pageant yourself. Just keep it interesting. The night will stay on his mind for a while, and so will you.