For anyone who doesn't know what the cupcake phase is, it's typically the beginning of a relationship when both people are very affectionate towards each other, and they spend all their time together.
PLOT TWIST.
The cupcake phase doesn't have to be just the beginning of your relationship. It doesn't have to end after the first couple of weeks. The cupcake phase does NOT have to end.
The term "cupcake phase" is just a social construct that lets (typically) the guy not feel bad for not being sweet anymore. Using this term allows the guy to be "off the hook" for not being as sweet as he was at first. It lets guys feel like they no longer have to send flowers or sweet good morning/night text messages.
But I call bull shadoody.
If you REALLY want your relationship to last, do not let the cupcake phase die. Keep it going. Keep flirting with each other like you did at first. Keep giving each other endless amounts of smooches. Keep cuddling. Keep holding hands everywhere you go. Keep giving your partner compliments.
If you don't want the fire to go out, don't let it. Don't get lazy. Don't get unaffectionate. If you want your relationship to work, you can't stop doing the things you did to get the relationship. That's not how love works.
So just love your partner. Love your partner to the best of your abilities. Never stop trying. Don't let your cupcake phase die unless you want your relationship too.