That's a totally normal length of time for a 2 month-old to be feeding. Feeding length varies widely among babies. Some get the job done in a hurry, others take a long time. And when a baby nurses, he may spend a little extra time cuddling and nursing for comfort rather than for nutrition.
Are you using slow-flow nipples on your bottles? It's recommended that you do, to keep the baby from developing a preference for the rapid flow and easy rewards he can get from the bottle.
Coolest thing my big girl said recently: "How can you tell the world is moving when you are standing on it?"
Coolest thing my little girl sang recently: "I love dat one-two pupples!"