Just venting

I have this friend that recently got a boyfriend and they're moving FAST have been together less than a year and are already talking about marriage and babies and that's not my issue love is love but I just feel protective of her because I see the red flags that she is blind to right now but I'm not going to say anything because I want to support her and if this relationship does fall apart I'll be here to catch her. It's just really hard feeling like you're loosing your bestfriend to a guy who isn't as great as she thinks he is.