A question for men in regards of unrequited love?

A few years ago I meet this guy on a previous job, I was on my late 20's and he was on his early 30's

We got along well and I thought I gained a friend/acquaintance while being there, but I confess that in order to let him know I was interested in having a connection with him, I used some physical contact with him to see if he would open up to the idea of getting to know me better. It was nothing over the top but I like to read books about body language so I used it at my favor and also there's cultural aspects that makes it okay for us to engage on it without being weird.

Fast forward to some months after, I developed feelings for him but decided to maintain things neutral and casual but also making myself more available to see if he wanted to spend time with me.

I only confessed to him when we stop seeing each other regularly but before that things were normal and im still confused on why he decided to continue having this type of physical contact with me knowing or even suspecting that I was interested in him?

Like is this a regular thing that men do? Even if you receive enough attention from everyone you just want to benefit untill you no longer interested? Doesn't that make you a self-serving person?
A question for men in regards of unrequited love?
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