I'm going to barge in on my friend's relationship
Why would you barge into a relationship?
Because she is my friend, and I need to help her. They are moving too fast.
You shouldn't interfere in your friends' relationships, because they have made their decisions and probably feel happy about them.  It's good to think about your friend's safety, but unless you have a good reason to intrude, you should respect her choices.
I want to help her. I'll kick him out of her room if i have to.
It sounds like this is jealousy. You shouldn't feel this way and instead work on having a relationship of your own.