It's best if u go to the PI first and visit your lady love from then on you can assess whether or not you want to continue your relationship, go to the next level, etc etc. (fiancee visa, getting married, family)
Philippines has a lot of things to offer: sunny warm weather, perfect white beaches, gigantic malls, restaurants and fastfoods everywhere, hospitable people and so many to mention but be careful...be really careful... be wise so that no one will take advantage of you
P.S.
Take lots of pictures (this will help in your gf's visa application)