I barely know this dude and he is trying to marry me but I don't want to disappoint him ? Please read

I barely know him I was drunk the other night we ended up having sex the condom broke he is an immigrant and wants to marry me for that reason he asked if I would be willing to he says he wants to be with me and have an baby I'm not ready I don't like him he doesn't have his shit together I'm scared I feel USED he lied saying he has money but he is broke I'm stupid I'm trying to move on from my ex and I really need someone but I just can't do this I want him gone how do I come about this in the correct way someone help 

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