Your Dad wants an immediate answer from you so that he can make up his own mind about you, and that's unfair. Life doesn't work that way, you have to work things out in your own time. He's being selfish by rushing you, and you can't let him control your decision making, and must let him know that he has no right to do that. Yes he is in pain, but that's his problem, and you can't worry about that. You should tell him that you will not accept being rushed by him, and that you have to work things out when you are ready. If in the meantime he decides to cut you off, he needs to understand that he will wear the choices of that decision, as well as you.
Nothing in life is permanent, even the big questions come up for scrutiny sometimes; your choice of career, life partner, god.... you need to accept that this isn't something that you can decide on this week; it will take many years or ever possibly your whole life, and frankly that's okay. This week though, all you have to decide is whether you want to sacrifice your relationship with your boyfriend so that you can play to your Dad's agenda. My personal opinion is that you should be assertive with your Dad, and tell him that it's not fair for him to hold your decision to ransom, and you will not accept this behaviour.
It's a bad week for you, I'm so sorry that you're hurting like this. Be strong and be respectful of how much stress this would be causing your boyfriend too. It was a good analogy; the football thing, but not even close as we all know. But do remember that it's not your boyfriend who is saying 'it's me or them', it's the witnesses and your Dad who are saying 'it's us or him'. If I were you I'd be wondering whether an organisation that is insecure enough to hold our relationships with our family and friends to ransom in order to retain our faith or some semblance of it, is guided by a loving god.
