What are warning signs women should look out for that point towards a man not taking her seriously despite being exclusive with a girlfriend title? Have any of you guys had experiences where you strung a woman along for comfort/ sex/ fear of being alone?

By strung along I mean this chick is thinking longterm or marriage and you just give her that official title so she sticks around. If so, how did you treat that woman compared to others you saw as a potential forever?

Not here to judge or question why men string women along btw cause women do the same. Just curious for signs to watch out for!