I have been on Dutasteride for about 8 months. Yes you will experience a decreased libido, but that will go away withing 2-4 weeks. About that erection thing that you dont get in the morning, dont worry about that.
As long as your sex drive is ok, you should be just fine.
After 8 months of Dutasteride everything seems ok, i have no problems during intercourse. Maybe its because im only 22, but you never know. Give dutasteride a shot for a month or two, and if you dont like the sexual side effects, there are other treatments out there