Is there a way to not be sad?

I don’t even have something major to be sad about like grieving death or immediate danger.

I try to do stuff like hang out with a buddy during the day.

One thing I feel bad about is that the woman I’m dating randomly seemed distant recently and in my own flaw I pulled away for the time being because I didn’t want to risk getting more hurt trying to filter things.

I try to feel better by thinking there’s so many men that don’t know her so they don’t feel sadness over her, why should I be bogged down? Or I think I can find someone else is she is not compatible instead of feeling sad over her