@Mimi
Filipinos are generally almost too excited to see it to an extent, but many do get over it quickly and are perhaps a little suspicious especially if you are a little too in to it. In dating, some women begin to wonder why you are trying so hard (if learning) or why you already know so much (WHO taught you??),
But, there is another type of Filipino who just doesn't respect a foreigner learning it at all, they will always respond in English, and will basically treat the attempts with disgust. It feels to me like they are saying why on earth would you be wasting your time on this. This can be disheartening lol.
However, it's the rest of us foreigners who cringe watching other foreigners generally just try too hard to pinoy bait for some type of gain money or otherwise.
If you are going to live in the Philippines, learning Filipino will probably be rewarding and worth it. If you are just trying to show interest in a man or woman I'd suggest there are better ways to gain respect and favor. Learning Filipino/Tagalog is a huge investment of time and effort, most learners don't realize this, if they did they never would have started (and most fail anyway).
Probably more than you were asking, but perhaps helpful for others too.