Is it me or my girlfriend causing problems?

[Messykatt]

I didn't make it through this wall of text. But what struck me as obvious is that you are barely communicating with her at an adult level. Yet for some reason you proposed to her? You said that as if it makes some kind of sense.

You're moving at warp speed in this relationship, and even when there aren't red flags everywhere, this is both risky and illogical. With the red flags in here, it makes your "engagement" flat out insane.

We're only hearing one side, but it's obvious you combined being young with moving too fast. This rarely ends well. If you're not ready to pull the plug, at least try to talk to her on a mature level and slow things down. Cancel your silly engagement and work on your relationship.