Les Miserables - Her Love

First of all, I don't know WHY ON EARTH you said that this sucks and looks ridiculous. It's so, so fabulous.
As to the execution and techniques of the drawing, I love how it has nice clear lines, but doesn't look abrupt, or like a plain line drawing. Not that there's anything wrong with line art, it's just nice that this is a bit more than that. Also your shading is great, and really shows the texture of everything, especially the clothes. It's great that you put the blood on her shirt. So many people draw Eponine dying with no blood at all. It kind of annoys me. I mean, she's dying! There's going to be blood!
Now for the fun stuff - expression, emotion, character, whatever. This drawing has so much emotion, it's truly wonderful. Eponine looks like she is in pain and sad to be dying, yet also happy to finally be with Marius. Marius has great emotion too. He looks so sad that his best friend is dying, touched that she loves him, but also peaceful. I'm reminded very strongly of the line from A Little Fall of Rain that says "Just hold me now and let it be, shelter me, comfort me", because that is exactly what Marius is doing.
You're maybe aware that, in the book, Eponine asks Marius to kiss her on the forehead once she is dead, and he does so, but I like how here you have him kissing her before she dies. It seems better that way.
It seems to me that you modeled Marius on Eddie Redmayne, though that could be wrong. If it is modeled on him, congratulations, because you captured his likeness very well.
However, I'm not sure if you were modeling Eponine on Samantha Barks, because she doesn't really look like it. Having said that though, she still looks great, just not like Barks. Funnily enough though, your drawing reminds me a bit of a girl I know who played 'Ponine in a school production.
Let's see... anything you could improve on? Not much. I've got three little things.
1. It looks a bit like Eponine is wearing makeup (mascara or eyeliner or something), which obviously she wouldn't be doing. It's not bad though, and I know it's hard to make eyes so that they're not either to light or too dark.
2. From the way you drew Marius's hair, I get the impression that there is a bit of a breeze coming from the right side of the drawing, in which case you might want to show that in Eponine's hair too.
3. This isn't really about the art itself, but don't be so hard on yourself! You are an amazing artist and very talented. I love this piece, so it makes me sad that you would be so hard on yourself about it! It most definitely does NOT suck.