31 years old, PhD student looking for accommodation in Frankfort am Main

I'm a PhD student who looking for accommodation in Frankfort am Main with a clean and honest person. We could talk about details. I'm so kind and self-motivated person, with variety of personal abilities, no smoking but friendly relationship. The flat should be as closest as the city with easy access to commuter trains and university. I more look for a roommate who is smart, clean, preferably interested in research or work in a team, and we can rent a shared apartment with those specifications.