Do you think I should propose? Is one even needed?

My bf and I have been talking about marriage and agree that it will happen after university. We've planned what will happen in the future such as, if and when we want kids, where each other are wanting to live after schooling, job options, wedding options...just future plans as a whole. Do you still think one of us should propose? Our families know we are serious but my father and grandparents are very traditional so it might be nice for them to try and do something 'traditional' (ish) in this relationship. His family isn't and keeps asking when the kids are coming :P I've been considering, after university, proposing to him, but I'm not sure if any proposal is really needed? What do you guys think?

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