time doesn.t fly. nor does it crawl. it.s fixed. it.s K - a constant. 24 hours make a day. we can.t add or subtract from this. (we won.t go into the logic of what makes up an hour or a second because that isn.t relevant here.)
now if time is constant, it.s not possible to change it. your day is divided into x hours of work time + y hours of chill time + z hours of sleep time etc. there.s no time to do anything else than what you.re already doing. but here.s a proposal: sure it.s impossible to change time. so what?
how do you mean? time flies when you.re doing something you like - playing an awesome game, watching an awesome movie, pub hopping with friends, skydiving - and crawls when you.re doing something you don.t like - we all have those boring-as-hell tasks that we postpone till the last minute.
being in love is a quintessential bittersweet example: it.s always too soon to leave your partner.s side.