If you want commitment, and after six months she isn't talking about the future, then it's time to move on. If, after a year, you are not both sure enough to be willing to set a date, then it's time to move on.
There's one simple truth I learned in my life. Nothing makes a man more attractive to a woman than another woman's interest.
During one of the many rough patches between me and my exwife she had been really taking me for granted and was beyond being just “cold.” We were at a store in the mall when a young lady friend/work colleague saw me and greeted me with a brief hug. That evening my “exwife to be” became a LOT friendlier.
Eventually, I got sick of head games, mental abuse and undeserved resentment so I got off the emotional roller coaster. That was the best decision I ever made.
“If you want commitment, and after six months she isn’t talking about the future, then it’s time to move on. If, after a year, you are not both sure enough to be willing to set a date, then it’s time to move on.”
Beyond that, as in so many other bonds in life, “equity rescuing” kicks in and the trap is set.
If she won’t go along the path to get married, for a long time - yes, that’s a warning sign and time to think about moving on.
ALSO, if she wants to get married too quickly - that’s a warning sign. Don’t move quickly with that one. Check things out more thoroughly.