Try not to feel bad for not being productive or "doing nothing". That idea that we always need to be busy and doing tasks is not natural. That is a direct result of our political and economic systems of choice.
If video games bring you joy, then it's not a waste, period. If "doing nothing", brings you enjoyment, then it's not a waste. We've been convinced that just enjoying our time, enjoying existence is a waste because it doesn't produce money.
I mean, you are 19, you are allowed to make this choice. But, I would say don't rush it.
Romantic love is the most fleeting. It's the most fickle. We have romanticized this idea of "the one" the "soulmate". But the odds of actually finding that person are very slim in life. And even 50% of marriage ends in divorce.
It's not the be all end all. There are many different kinds of love that can be just as fulfilling or even more so than romantic love. It can be cultivated in many places. Also a lot of people think this but it baffles me, but romantic love is not the only place one can find sexual connection either. And I'm not talking any illegal shit.
Being broken up with is terrible. I hate losing people, for any reason. It's only been two weeks. You were in love with him. It's totally valid to mourn a lost and unrealized(?) love. But ctb'ing over it just seems a little extreme. Not invalid, just extreme.
Like I said, your choice, but maybe don't rush?