first cat behavior change

Question
I recently adopted two cats from the shelter.  I was able to bring home one before the other.  The first one is George, and he is 4.  The shelter did not have much info about him, but noted that he had been brought in with another cat.  George was in my home for three days before I brought Bear home.  During those three days, George purred everytime I pet him, and eagerly awaited being petted.  He was my constant companion, following me everywhere.  
I brought Bear home, and Bear is a year older, quite a bit bigger, but the most affectionate cat ever.  He has not hissed or tried to dominate George, and seems content to take a back seat to George.  Bear seems to possess a more laidback personality, whereas George seems to need to be near me at all times.  
What I know about Bear is he was previously in a home with other cats, and had gotten along well with them, grooming them and such.  
My main concern is that I have permanently hurt George, bringing another cat home, and I fear that he won't return to his affectionate, purring ways.  I wonder if I should return Bear, and become a one cat household, as George seemed so content, playful, loving.  Or, perhaps, I am being inpatient, and I need to give it some time.  (It has only been two days since the two cats have been together.)
Thanks for any insight/advice/suggestions that you can offer.

Answer
Heather,

If after the short time of two days they are getting along you are very lucky. It sounds like you have two affectionate, loving cats.

No, in my opinion I would not return Bear. It is not good for a cat to be TOO bonded with you. It is too demanding of your attention and time. It is good for them to have a feline companion also if they get along.

Just be sure you give each cat attention and love away from the other one. Then give them both love and attention together.

George seems to be more needy right now and it seems as if Bear understands that. At this point George is probably afraid that he is going to be taken away from his home again. He is sticking close to you to make sure you don't go away. After a while when he sees that this is his home and he is going to stay, and you aren't going to leave him somewhere and disappear, he will settle down because he will be more secure.

Bear may be the wiser of the two, and though he has had the same experience, he is dealing with it better, or it was not as traumatic for him mentally as it was for George.

Playing with them interactively is good therapy. A pet laser light is always a hit, or even pulling a shoestring for them to chase.

It sounds like everything will be fine once they get used to their new home and get into a routine.

Tabbi