Searching has failed me, so here's a few questions about relationships.
First off: how exactly do relationships progress along the road to marriage? I think in my 3 forts (still a bit of a noob) spanning over 20 years, I've had 1 marriage. It happened randomly and so long ago I don't even remember the process of it getting there. In my current fort, I ended up with 4 of my original 7 in two relationships (lovers) within a month of embarking. It's been 3 game years, and... that's all there is. They're still lovers, but not married or anything yet.
Second: can you encourage dwarves along this path in any way? My initial suspicion is that being a lover is a random offshoot of being a friend and can happen when friends are socializing. If that's true, can I just sequester two dwarves together and hope this happens? If they're already lovers, can you encourage them to get married this way? What's the best way to pin them together? My experience with burrows is that they're not all too reliable at getting dwarves to just stand in a spot.
Third: are grudges permanent? I'm suspecting yes, but would be happy to be proven wrong. One of my starting 7 has grudges with just about everyone he talks to. I suspect even if grudges weren't permanent, his abrasive personality would prevent him from recovering from them in any way.
Yes, I know making dwarves all friends is generally considered a bad idea for the tantrum spirals that can ensue, but this is for my community fort where the story matters a little more. That, and after losing nearly half of the population of my last fort and nobody batted an eye, I thought it was time I maybe did finally get a tantrum spiral. I don't feel like a proper dwarf yet.