Ted has dated many people and been in several long-term relationships. Ted has an on-again, off-again relationship with Robin. Ted also dated Victoria, Stella, Zoey and Jeanette. Ted finally gets to meet his wife-to-be, Tracy, on the day of Barney and Robin's wedding, after accidentally teaching one of her college classes, owning her yellow umbrella for a short time, and dating her roommate. When he ran into Tracy's roommate (Cindy), it led to Tracy's band performing at Barney and Robin's wedding.

Can we conclude that is stella the mother on how i met your mother?
no