As people have already said, the easiest way to work with a situation like this is to just come up with an answer to the question of "why aren't they together yet", and make that issue the backbone of the plot. For example, Romeo and Juliet, the most famous love story of all time, does this very successfully. ^^ Create a situation that keeps the lovers apart, or craft the lovers' mindsets in a way that keeps them apart.
Something I like to do often is just make it so that one (or both) of them just doesn't realize the true nature of their feelings for a while. The partners will have an amicable relationship and be very close, but don't perceive it as 'romance' until usually the climax of the story.
Some might see it as them being "oblivious", but in my work it's mostly the character(s) simply not seeing themselves as viable romantic options. So it doesn't occur to them that they are deeply in love with someone who loves them right back until long after the ship has sailed. ^^; I find it endearing; writing relationships that way makes the 'getting together' part just the icing on the cake of an already-solid dynamic, rather than a nebulous potential dynamic that never gets fleshed out because the story stops right after it happens.
And on that note:
Assuming you mean 'nowhere to go from here'-- I don't think I agree with ^this.
I mean, I think it's a valid statement, because that's genuinely what most people believe when it comes to romance. I just...as a writer, I refuse to accept it. >_< There are a thousand places to go from there, plenty of people write about them, and I think the romance genre as a whole would benefit if the idea were more widely accepted.
I've been recently trying to develop a romantic subplot that works with both of these ideas: love at first sight (more or less...) and the characters actually deciding to just date each other pretty quickly-- plus, they have very similar personalities to begin with. And yeah, it's hard, and it often does feel like "what am I even writing about then", but I enjoy the challenge of simply making their dynamic interesting enough that what would usually be the 'end goal' is just the tip of the iceberg.
What are they learning from each other, having come from opposite sides of a class war? What are they learning from each other as fellow veteran fighters? How does he get along with her friends and family, and how does she get along with his? How do those relationships encourage or discourage theirs...?
Are there hidden downsides to finally meeting someone who 'understands' you? Does learning to love and be loved take practice, like everything else...?? When their time together comes to an end, will they be ready for the pain of saying 'goodbye'...? There's just so much more to explore than 'will-they-won't-they' once you think about it...or rather, you don't actually need the tension of 'will-they-won't-they' to make these things engaging and interesting.