What’s a sign in the beginning that a relationship will last?

Coming out of a 2 year relationship where i missed a lot of signs along the way that many people picked up saying she wasn’t as invested. So part of me really wants to be patient take my time and really evaluate the next girl if there is one because I don’t want to waste more years thinking a girls fully invested and get played again

What’s a sign in the beginning that a relationship will last?
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