What if I told my boyfriend I'm sad because he had to leave so soon?
Why are you sad about him leaving? Are you kidding about this?
Because it's like an empty hole had opened in my heart, like I had lost the most important thing.
It's good to care about the people we love. I'm sure this makes your bf happy.
I'm just trying to see what happens if I say this. The plan is to make him think that I care about him so that I can get him to do things for me.
This doesn't sound like you aren't being honest with your feelings. It's rude to deceive people into thinking things that aren't true for your own gains.