heamatite2000

i-693 is only valid for 1 year and must be valid on day you get approved. So if your AOS takes longer than a year to complete then you will have to redo it and pay for it again if you did it before you sent in the paperwork. USCIS itself recommends you hold off sending it in with the other forms but some people decide to be proactive.
 
You are NOT required to submit Form I-693 at the time you file your adjustment application, but may do so if you wish. Because of the time-limited validity of Form I-693, you may choose to submit your Form I-693 after you file your Form I-485. You may also submit Form I-693 in person at an interview in a USCIS field office, if an interview is required. By waiting to submit Form I-693, you may avoid having to repeat the immigration medical examination. For more information about Form I-693 requirements, visit www.uscis.gov/i-693 .

~~~Moved from What Visa Do I Need - Family Based Immigration forum to Adjustment of Status from Work, Student, & Tourist Visas forum~~~
 
***Official Moderator Warning; the answers provided by EmilyW and Suss&Camm regarding a 30/60/90 rule are correct and the issue is not to be debated any longer.  Failure to abide by this warning will result in Administrative Action.***

Unfortunately far too many ppl read websites like that and believe it to be true. 
 
For the OP, once again, what's posted above about the 30-60-90 and fraud IS NOT TRUE. You are perfectly fine to go ahead and marry and apply right away. You have received good advice from ppl here on VJ that are very knowledgeable and would never advise on anything that might be detrimental to your process. The only motif of these ppl is to help others through a smooth immigration journey by providing accurate information. Please be critical of the sources provided that talks about the 30-60-90. You will find that it is not based on fact.
 
I wish you much luck in going forward and a smooth journey whatever road you head down.

You can marry whenever you want to. There is no waiting rule. You will just need to prove a bona fide marriage as anyone else getting married to a USC and filing for i-130/AOS at any time. 

Hey, a lot of people get married under tourist visa, I know some couples that did it and have not encountered any problem so far (I don't about the visa that you have), you just have to make sure that you do not get married in your first 80 days here and when they asked you at the interview when you decided to get married just say that in the imminence of getting separated you guys decide that you loved each other enough to make the move and did it. You have to have proof that you guys have a real relationship and there is plenty of posts here that will give you an insight of the profs needed. Before I got married to my husband (under a tourist visa) we went to a lawyer office and he told me that as long as we waited about 80 to 100 days to get married we would be fine, he said that our case was not a big deal because I was still lawfully in the country and he also told me that the case would probably take not more than 6 to 8 months to be complete with the employment authorization been processed in about 3 months. I don't think that your case is going to take more than that, specially because you're in orlando and the timeline around there is not that big...take a look at timelines around here and at USCIS website.
Good luck to you and your boyfriend!

I spoke to an Englishman last May who 9 years ago went to go see his girlfriend in the US and was advised by his immigration lawyer to get married on exactly the 60th day of being there and he didn't encounter any issues and followed up that advise . So I guess the 30/60 days something 

There is no rule on how fast you can marry.
 
First, I would recommend that before you get married you fill in the forms you will have to submit to AOS and put together the paperwork you will have to send (like a copy of your birth certificate). That will probably take you a couple of weeks. You don't want to get married and then realize you cannot AOS because you don't have the money for the fees, you are missing paperwork, or you don't have a financial sponsor, because a marriage visa takes 12-14 months (whereas a fiance visa takes 6 months).
 
 
Second, in some places getting married can have some time consuming requirements so you need to find about Orlando.
 
Third, check you i-94 for the date you are supposed to leave the country. To avoid problems, get married before that.
 
Anyway, I would not postpone this. Filling in the paperwork will take time. Then you can decide where/how/when you want to get married. 
 
Good luck.
 
VJ is the best place to ask questions. People here know a lot and there are newer threads on AOS while in the U.S.