Dude your 17 stop thinking about marriage. I was the same as you at your age. Had some chick I thought I loved but na the sex was cloudin my brains. Have fun like everyones saying if it leads to it she'll change her mind on her own. If you can make it 4 months its a miracle worry about 1 month anniversarys before you worry about weddings.

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THE TRUTH IS I'M BETTER THAN YOU