If you feel commitment means sticking to your partner all the time or making yourself the centre of his universe at all times, you need to give your thoughts a shift.
If you are in love, you need not get consumed by each other entirely!
Maintaining some aspects of singlehood, in a relationship is actually the best approach. The flavor of having independence in a relationship only makes it stronger. That way you don't lose your own identity. You ain't in a desperate mood to clone yourself just to please your partner either.
Your partner would not be under too much pressure to be your everything.
If you have really great friends, social interests to keep you happy, your partner won't feel the pressure to be responsible for everything. Both of you would be happy beings in your own territories and therefore your union would be a joyous affair.
No one individual, neither a partner nor friend, can fulfill all of any ones individual's needs.
Socializing keeps you Rejuvenated.
Relationships can provide a bounty of emotional, practical and financial support. But finding the right mate is no substitute for having friends and other interests. Having a social life outside your relationship keeps you from getting bored. Being out with your friends, enables both of you to have new experiences that broaden interests and perspectives, and pursue passions that otherwise might fall dormant.
If you invest time in your career, you will have more things to discuss.
Different interests or career paths that you're passionate about only gives you more new things to discuss in a relationship. And even if both of you are on the same plane, talking about your personal experiences can provide a better insight in realizing each other's ambitions and workplace hassles.