My belief regarding your fear of failure in marriage: everyone fails. You'll at times be selfish, you'll sometimes wonder if you're in love at all, you'll find your mate unattractive at times, and occasionally you'll wonder if it had been a good idea to get married. Luckily, marriage transcends momentary feelings and mistakes. All it takes to succeed is two people who respect their vows before God to work through it all. Marriage is a commitment above all else.

If you're having lots of doubts, though, I suggest you work with your counselor to determine whether that's because he does not have what it takes to be a suitable partner or whether it is your fear of intimacy hindering progression of the relationship