My partner lives in US long before we had a baby and soon enough, we'll be migrating to his place. What language do you think I should teach my son? English or Filipino? I don't want him confused, as I've learned that teaching two languages somehow delays speech, however, I also don't want him to forget our Filipino roots. What do you think is the best way to deal with this?

While studies have shown that children raised bilingual do take a little longer to start talking than those raised in monolingual households, this delay is temporary and certainly not a general rule. Alot of us grew up in bilingual households and grew up to be fluent in both. My view is that you proceed with raising baby with both languages. Being able to speak Filipino will help him identify with his roots -- especially when he visits the Philippines in the future.