There' s no reason why a woman can't be the one doing the proposing. And if you're a guy proposing to a guy, the same ideas and steps apply.
Part 1 of 3: Planning the Proposal
1- Figure out if you're ready for this next step. Marriage is a big step and you want to be sure that you're taking that step for the right reasons, because you've found someone that you honestly want to spend the rest of your life with, not because all your friends are getting married and you think you need to, as well.[1]
If you're looking to get married because you're trying to 'save' the relationship or because you're scared of being alone, those are not reasons to get married. In fact, it's probably a good idea to let the relationship go.
However, if you know for certain that marriage to this guy is what you want, then it's time to go for it and put your energy into making it happen.