I'm going to be a bad partner
What makes you think you'll be a bad partner?
I will be unable to share my reactions because I hardly ever have any.
It's important to try to improve if you are going to be someone's partner. A relationship is something serious, and you should consider the other person's feelings. Try to learn how to support and understand your partner's feelings.
We made vows. If he/she loves me, he/she will be patient.
If you know you're going to be a bad partner then you should start working on changing this. If you're unable to do it on your own you could see professional help and counseling. This way you can learn to be the partner your spouse deserves.