Follow up question: would her feelings on marriage be different if she were a plebe vs patrician?

I think you may be confusing the concept of anyone marrying for love at all with the idea that all marriage should be based solely on love, which is quite modern, or that all marriages should at least incorporate love, which is generally associated with the eighteenth century. You are correct, though, that marriages in the Roman Empire didn't require love, though they did require the theoretically free consent of both individuals involved. (And both individuals' fathers, if still living, and/or the girl's guardian.) Most would have married in their late teens, to men in their late twenties, but upper-class marriages would have occurred a few years earlier on both sides, since families with more to gain from good matches, more to lose from bad ones, and more interest in dynastic concerns in general wanted to take advantage of being able to marry off their children as soon as possible.

Unfortunately, we don't know very much about how women felt about their marriages, because they left very little record of their thoughts, so this answer is necessarily brief. But one thing we can say that marriage would have meant to a Roman girl was that she was now an adult. Something that is quite modern is the idea that the onset of adulthood doesn't need to and even shouldn't go hand-in-hand with getting married, but this was really the only ceremony a Roman girl had to mark her coming of age. While she lived in her parents' home, she was considered a child; before marrying, she would ritually burn her toys and possibly her childhood tunic. Marriage was also the time of a young woman's initiation into sex, unless she were a slave or a prostitute, and brought the possibility of children of her own. While there was most likely fear of the wedding night, pregnancy and childbirth, and potential abuse by a tyrannical husband, to be a perpetual child was also something to be feared.

You might be very interested in Youth in the Roman Empire: The Young and the Restless Years?, by Christian Laes and Johan Strubbe (Cambridge University Press, 2014), which addresses this issue and others relating to growing up in the Roman Empire.