From the above discussion it is very much clear that the main difference between dating and relationship lies in the level of commitment.If u want to be in a relationship then you should be responsible towards your partner.The goal is that you're working toward a relationship, which is the next big stage of commitment.However, your partner might have a few people on the back burner just in case things don't work out, and so may you.
And if they are lucky enough then they get to spend their whole life together. A relationship is always mutual with the same level of commitment and seriousness from both the individuals.
Maybe you will even start keeping your tampons in the bathroom of the company, and you'll get your own drawer, keys to the apartment, and place in the fridge... A relationship implies some sort of goal for longevity and a commitment to working things out when problems arise.
A relationship is an investment in the future and is not something that should be assumed. When you decide to take that step with your significant other, there's a world in which you can imagine them as your spouse or as the parent to your children. Your significant other's mom calls you just to chat.
Sometimes, it is just assumed by the amount of time and energy you are both putting into the relationship that you are only seeing one another.
But make sure you're being realistic about this assumption, and not just basing it in fantasy. If you're ever confused, just ask your partner casually.