People have a tendency to become disillusioned with me and I have a tendency to take them for granted. Help.?

Whenever I meet new people, I'm always interested in them and want them to be interested in me. I get such a rush out of it that I get off to a great first impression and people frequently find me very likeable for a period of time. However, after a while I begin to lose interest in these people, and they becomed disillusioned with me, noticing that I'm self-absorbed and abraisive. It's terrible feeling meeting new people and knowing that in a few months they'll avoid you for others and will no longer message you and a weak friendship. Slowly, I watch the other quieter friends of mine become more and more prominent beacuse of their good character. It makes me sad. What would you do if you hung around people knowing your time as good friends was limited?