Option 1 is way too distracting and confusing. Option 3 looks messy and is inefficient, and uses a lot of space for something that could be covered by 4 characters by putting it elsewhere.
I like number 2 the best because that is the standard for how abbreviations are written all over, not just RYL. When reading a book or publication that has an abbreviation the abbreviation is always presented immediately after the line it is abbreviating.
Thus number 2 is the only acceptable choice
