Neither is actually viewed as healthy. Social parasites are sometimes harder to spot.
For your case it's the transition that's tricky: Friends assume you want to keep being friends and may worry if that changes. After a while they'll give up, assuming you've moved on. If you're sure that's your path then just stay the course, but know that it's harder to come back from if you do get lonely. It's harder to make and keep friends later in life. It's harder to find a spouse if you're alone all the time. Interestingly, a spouse + kids may solve your social obligation/boredom problem.
For my case, wife and kids made keeping friends AND a job impossible. Married men are expected to be present at all times for family now except for when at work. Anything regular outside of work is considered neglectful of either your children or your marriage. No hobbies except those that can be done at home after kids go to bed. No social commitments not involving spouse and/or kids. Fatherhood standards are pretty high these days. I don't have any "friends" anymore, but because I have a family no one asks about it anymore either.