I was a solo Backpacker, I met some Female solo backpackers as well. It's relatively Safe kung yun po ang concern nyo. Pag Babae ka, there are few things you need to remember when you are traveling alone;
1. Don't easily Trust a super friendly stranger
2. Never Get drunk
3. Never Leave your drink, when you're in a Bar
4. When Invited to a place of a new found friend, invite them to the place where you are staying instead or Meet them in Popular place where people go
5. Avoid Walking alone at night, Befriend Atleast a Group of friends
*** Remember, You are in an Unfamiliar Place, Traveling alone is Safe if you Know how to handle yourself well.
Enjoy Tarveling Po