Hi Mary. You are better off cruising with a Singles group. You can join their Match program or get a cabin by yourself.
You have not stated what, who, where, when....
You need to give us more information like...... are you a smoker, drinker, party gal, etc. Do you plan to hang out with your roomie or just do your own thing alone. Most cruise ships attract couples and families.
Are you looking for the perfect roomie who is a loner, quiet, doesn't snore or cough during the night.... doesn't need to have the t.v. on at night in order to fall asleep.... wants to bring a guy to the cabin.lol.
I am not a perfect roomie so that is why I prefer to have my own cabin. Or, cruise with only people I truly know. Luci