I'm sure you've already read the other reviews about dialogue formating, so I'll just echo how important it is to start a new paragraph for each new speaker.

Aside from that, this is totally adorable and I really like it. Keep writing and I'm sure you'll get even better!

The story itself is sweet. But the giant paragraph you have it as is a mess. You need to break it up with line breaks so you can see who is speaking. Just like any story you've read.

Don't give up, just learn and fix it.

I'm not entirely sure what you were going for here, so I'll say this. The formatting is really impacted and doesn't flow very well. You should very much start a new paragraph when either of them speak separately. There's also not really any pre-text as to how anything got this way, with Weiss being all emotional to Ruby and all. It was a good start. No fanfic is perfect.