If you are looking for a nice place to stay in Amsterdam, here are some B&Bs’ I can highly recommend you:
The “Little Amstel” is a Bed and Breakfast situated, as its name suggests, on the emblematic river of Amsterdam. It is a floating house, composed of two lovely studios (both double rooms) and located a few steps away from the oldest part of the capital city. Its host and owner Andrew is ready to welcome you with open arms. Have a look at the “Little Amstel” website.
If you need, I can book a room for you in one of these B&B.