There is a girl I'm dating. We play casual games for fun frequently (e.g. card games, board games, etc.). The problem is that I win at these games almost all the time. Even when we've found a few new games that she's initially good at, after we play for a bit, I usually end up winning consistently afterwards.

At first, I thought this was a good thing, but now it's getting to the point where I'm afraid it's just leaving her with negative feelings since she loses so damn much. Suggestions?