Bear with me, this may get long! I am new to these boards!
Since you have been in a relationship for about 2 yrs now, I don't see anything wrong w/ having a discussion about your future together.
Time and time again when couples move in together with the woman expecting to get married, the guy does not seem to get around to committing to a date or getting the ring.
He has the best of all worlds so why should he get married?
If you can't talk to him about what YOU want without fear of upsetting him, then it's not a very good relationship.