What do I do if I want to get married here in US with my longtime boyfriend, but I’m still married in the Philippines since 2009?

You need to divorce your husband before you get married. Provided you can serve your husband with the divorce paperwork, you can file for divorce in the state and county you reside in (provided that you have lived there for 6 months and 3 months, respectively).

If you are married anywhere in the world, you need to get divorced and then remarry. If you don't do that, your new marriage will be null and void...also bigamous. Get a divorce. A paralegal can probably help you through the process based on the length of time that has passed since you separated from your first husband.