Definition: Give a false impression of one desire in hopes of receiving another.
Here is a scenario:
1.She wants a relationship.
2.She wants deep connection.
3.She cares for her potential parnter in many ways.
On the other hand,
1.The guy pretends to want a relationship.
2.He pretends to care deeply for the girl.
3.He truly and only desires the sexual activity. He convinces the girl he wants more.
4.He deceives, lies, and cheats.
To use someone means to deceive them, to lie, and to cheat in hopes of receiving something in return.
To answer your question:
1.Are their actions aligned with their words?
2.Are their stories and words untrue?
3.Are they not meeting your needs directly?
These are signs he is using you for something else.
1.See what happens when you refuse them on multiple occasions
2.Ask something of them as well, see if they refuse or accept
In all of the above, look at their reaction, see if they care or that you did that for them or not, or if they were annoyed that you couldn’t do it.
Also, think. How often do they ask you of things? Wold you rather do something else instead of helping them? When you see that person, are you annoyed?
They always take, always ask, and never do the same back to you.
They may be nice, polite, and nice to be around. But you will never ever get the same from them. Also, it may be the only time you hear from them or see them is when they want something.
Those are some of the indications.