You actually have two problems:myboss said:hello everybody! I would like to seek for a very good advice from anybody here who has knowledge or had experience the same situation.
I had a same sex partner when I was still living in the Philippines we started living together from Dec 2008 to Dec 2010 till me and my family received our PR.
1) Because you failed to declare your common law partner, you can never sponsor him to Canada.
2) Because you were common law, from CIC's perspective, you were likely no longer your parents' dependent and likely did not qualify to immigrate with them. In other words, from CIC's perspective, it's quite possible you have have obtained PR through misrepresentation.
I assume that in your parents' PR application, you were listed as living at your parents' address - rather than at the address you were really living with your common law partner? (If so, this was also misrepresentation.) The best option is for your partner to qualify to immigrate to Canada independently (e.g. as a skilled worker). I think any other option either involves more misrepresentation or won't succeed.