It seems like you wanted to get out from this situation but you're not really ready to have a go with the options or solutions that is possible for you. You said that the only option for you is "Divorce" which you know yourself that it is not applicable to you and you dont want annulment coz its too expensive for you "which is your only option really cos you need to abide by the law of Phils since you're still a fil. citizen". You also said that you wanted to do it as quiet and simple as you can but you also know that it is not as simple as what you think your situation is...
If you are really seriously looking for an option, then wait 'til you speak to your solicitor and you'll get the proper advise that you want.