“Breadcrumbing” is when someone you’re interested in romantically gives you just enough signs and interactions to keep you interested. This can lead you to believe that they’re interested in dating you when they’re not. It’s actually a form of manipulation to keep you excited about the possibility.
Talking to someone you like should be fun and should never make you feel insecure or bad about yourself. Breadcrumbing is a sign that they aren’t really interested in a relationship with you, and that they don’t respect you.