String someone along :
To make someone continue believing something that is false for a long time, especially something about your intentions or beliefs.
The act of dragging out a relationship with someone while having dishonest intentions. This can be applied to friendships or dating. The person stringing along the victim usually is getting something selfish or one-sided out of the situation such as sex, money or attention from others. This usually ends poorly for the person being strung along. The victim is sometimes aware of the situation but does not break the cycle due to them being a tool, insecure, spineless or gaining something less from the relationship such as not being completely alone even though they are being used. People performing this act are usually Chav’s.
To falsely encourage someone to believe there is hope of a good result.
STOP this shit!
Abuse is all about power and control.