What is the definition of 'white / caucasian'? Am I actually 'mixed race / other'?

I come across the term 'white/caucsian' a lot when it comes to dating profiles.

When filling out my own, I usually I put 'mixed / other'.

What should I put? My father was Australian and my mother Philippine. My skin isn't dark but a bit tanned. I have black hair. I have some Asian features like being short (5'4"), lightweight (54kg), strong but not muscly for example. But I can go facial hair quite well and easily; having a goatee and mou.

I'm suffering a bit of an identity crisis here and I'm 30; you would have thought that I would have worked it out by now but I haven't!

I need to know as when I browse girl's dating profiles, I get hopeful when I see one that I want to write to...but then I don't because they specify 'white/caucasian'. I respect their wishes and don't contact them as I don't think I fit that category of ethnicity.

I discussed this with my sisters and their boyfriends and they concluded that I was 'white / caucasian' but I'm still unsure. Some opinions or answers from some more impartial people I feel would give me a better idea and perspective.

It would stand to reason that this issue is also causing a bit of trouble with my self-confidence.

Thanks in advance for any helpful responses.