Is there any way I could marry him in Mexico and still fix his papers since I will be 18 in two months and if so how long would it take to fix it?

You have a number of problems. To begin with, you must be 21 to petition someone for a green card. Also, depending on the reason he was deported, your boyfriend may be barred from returning to the U.S. for 10 years, and in some cases may be permanently barred. I strongly suggest that you contact an experienced immigration attorney for a face-to-face consultation and give him/her all of the facts surrounding your boyfriend's case. He/she would then be in a better position to analyze his case and advise you of your options.

Even if you get married, until he has satisfied the conditions of his deportation order, he will not be eligible for a visa.

After you marry him, you will need to submit an I-130 petition on his behalf. It will take approximately a year or more for the paperwork to be processed before his immigrant visa interview is scheduled at the US consulate. He will probably also need to file waivers on forms I-601 and I-212.

An attorney needs to know his criminal and deportation history. He will have to apply for at least one waiver and maybe more. The process can take a couple of years.

You will want to have an immigration attorney review the reasons for his deportation first before you do anything further.