Engaged??

So this girl that I have been trying to get a long with and really trying to improve our relationship (Spring) has gotten engaged! Yes you heard me engaged. Which I tend to think is really kind of weird because she complained about her boyfriend/fiance a lot. Things were just really weird and strange, I didn't understand why they got engaged but they seem happy about it  so I think that it's the right decision? I really hope it's the right decision it's not something that you want to make a wrong decision about.......