http://www.pinaysinglemoms.org/ This may be suitable for you, though it may alienate your partner. You could always try going to a regular support group. I think they'd understand your situation and be more than willing to welcome you!
You can try seeking advice from Ateneo CEFAM. They give counselling to couples and families who need guidance. I heard they're a great support group. You can check them here: http://www.ateneo.edu/center-family-ministries-foundation