-Are you going to get married or are you going to stay single?
I don't have a preference either way. The man I'm currently with has had some terrible experiences when it comes to marriage, and while I'd say yes in a heart beat if he asked, I just don't care about it enough to get worked up or worried about it. If it happens, great! If not, I'm still in an absolutely wonderful relationship. Not being married also keeps me out of child support/custody complications (if his ex wasn't a vicious money sucking harpy I wouldn't worry about it)

-Do you believe that you have to be married to experience 'true happiness'?
Not at all. I don't believe that marriage actually changes anything in a relationship. Or at least it shouldn't. Things should be solid and people should be happy before they're married. I'm the spawn of a couple who got married way too young, and stayed married for much longer than they should've (with 4 kids I can see why they tried, but it did more damage in the long run). If people are really wanting to commit to "till death do us part", just seems to make sense to make sure the relationship is livable and something that you want before making a legal binding.

-Do you believe getting married restricts you from doing certain things?
Depends on the marriage! Some people have fantastic open marriages, some people are strictly one on one. Some are chaotic and restrictive whereas others are more of a partnership. Being in a relationship now I know I can do whatever I please, but I chose to do things that make my significant other happy, because it makes me happy. It's all up to those involved in the situation