Ok glad, you cant expect to post this here without receiving opinions, so here are my 2 cents:
If you are spiritual/religious which I think you are (I dont so I dont care) marriage is supposed to actually mean something, a deep commitment, a promise upon a higher power that from that date forward you will help your partner, support them, put their needs ahead of your other family and even yours, ur pretty much becoming one, are you willing to be faithful, to support them in everything they do, to defend them above your own family?
I know lots of people in your same conditions that can make it just fine, however,
dont you make minimum wage at Chilli's? you have an old geo metro... other than love what else do you offer this girl? [\b]rent, phone, cable, internet, power, water, gas, all those things, can you make it, if she works that's great so you can have support since it doesnt have to be all you, if you are SERIOUS about this go for it but PLEASE have a plan, save at least 10% of your salaries for a rainy day, build your credit, make a REALISTIC 5 year plan that obviously doesnt include corvettes and banging MILF 
Good luck bro, you're a bad egg but ur entertaining as hell