If he says he is visiting his girlfriend in Canada, the VO would see that as strong ties to Canada. He can simply say he is visiting a friend in Canada and you can write a letter of Invitation saying that you want your friend to visit you and you will pay for his visit since he doesn't have money saved in a bank account.
In addition to the Letter of Invitation, he should submit:
1. Document proving he is a pastor at a church and will have to return to his responsibilities after his stay in Canada.
2. Document proving where his money is saved.
3. Letter of Explanation detailing why he wants to come to Canada, how important his Pastor work is to him which is why he will return to the Philippines, his family ties in Philippines, etc.
What if I ask my aunt for example to make the letter of invitation..Can she says that she just wants to invite the pastor (my boyfriend) to come and visit here in Canada (without us telling that the pastor is her niece boyfriend). Would that be much better? Because they wouldn't think that he's visiting me (his girlfriend) here..If that's better, what would be the documents needed?.
But along with that is my question, do we really have to prove that my aunt is in close relationship with the person she's inviting?.