Yes, I agree with previous posters, whatever you do, you should be comfortable with it. If you decide nursing is not for you, don't force yourself and be resentful later. As you know, I am very passionate about bfeeding and I nurse a toddler and like it. I originally wanted to bfeed for 1 year, then when I was closer to 9 months, I decided that we were both not ready to wean and decided to continue for as long as it is comfortable for both of us. Nursing an older baby is much different from nursing a newborn. It gets easier and at some point you can persuade your lo that she may need to wait or can get something else to eat instead. There are many health benefits for a baby and you, and the longer you nurse the lesser risk of ovarian and breast cancer for you and a baby. ANd of course, your milk is still an excellent source of nutrition, even past 18 months. However, the older is your baby the harder is to wean.
But I also know that it is better sometimes to do what woman wants and not to resent it. I would never recommend any woman to continue just for a sake of baby and forgo her own needs or dislikes. In a long run, you also should be happy about it and your lo will if you are.
It is also true that it is easier to wean earlier rather than later. For example it is much more difficult to wean a toddler who knows what she wants and can remember nursing and remind you about it than a baby who has shorter memory and no way to remind you LOL.
As I look at what I wrote here I am thinking that I should encourage you more to continue. There are benefits to both of you, both health and emotional ones. I can say it is a rewarding experience. But as we all said whatever decision you make it will be good for your family.