TS, my 2 cents.. ( i myself a christian)

If he ask you to convert, then ask him to forget about the relationship. He should respect your beliefs. And, vice versa if you ask him to convert too.

Marriage is between you and him. Do not care about your family or his family's objection to the marriage. If both of you listened to your parents, that means your love is not strong. If you love him, you should not listen to your parents, and he too, should not listen to his parents.

There is no big fuss about this. Your bf is a buddhist, you're a christian. Both of you can eat anything you want(except some buddhists who can't eat beef).. It will be complicated if a relationship involves muslim and non-muslim..

You can go to church, and if he wanna follow, it's alright. You can follow him go to temple as well, but if you don't want to take the colok, it's alright. You can eat free noodles and coffee the temple while waiting for him...
I have many friends whom one of their parents is christian and buddhist. They still live harmoniously, with buddhist statue and Jesus' picture in their house.

Based on your part 2 story, it appears that your relationship with him was hopeless as he doesn't want to compromise and insisted that you convert to buddhism.