Pascale: my first "get back into biking by commuting" bike was a Trek Navigator 200 - a comfort bike. I was just so thrilled to be riding it never occurred to me that it wasn't "built" to ride like that! I rode 60 miles a week on that thing, avg spd of 11-12 mph and climbed my cute (read NOT) mountain every night going home on that thing. I also did 25-30 mile rides on the weekends on that baby. By the spring I was "pining" for a road bike and in just a matter of like 4 wks I ended up with a vintage road bike, a MTB and withint 6 wks a 2nd vintage road bike!
So hang in there, the road bike for you will come out and you'll love it! and one day you'll climb back on that comfort bike and think "Holy Smokes how did I RIDE this thing for so long?" lol
Life should NOT be a journey to the grave with the intention of arriving safely in an attractive and well preserved body, but rather to skid in sideways, champagne in one hand, strawberries in the other, body thoroughly used up, totally worn out and screaming: "Yeah Baby! What a Ride!"