Bigguy still the same...lol....will he ever change?????

Actually 5 months is not that long of a time if he was really traumatized befor eyou got him. He may not feel 100% safe yet or he may just not have been socialized when he was a kitten. Here are a couple of things you can try: When he leaves the bedroom early in the day - simply go close the door. Later in the evening - open the door and let him back in. He will not like it at first; but, he will "discover" new "safe" places in the rest of the house and he will realize that when you go to bed at night, he can still go back to his "bed". Try leaving interesting toys in his "path". Place them where he can discover them on his own - do not "tempt" him with them. Check out what ones he likes and which ones he ignores. Some cats prefer furry mice while others absolutely love a feather. I had one cat that absolutely loved fresh cranberries and he chased them all over the house. Another cat loves the plastic rings that come off of beverage bottles - I just keep an eye on them and take them away if he chews through them so he won't accidentally swallow any plastic. So toys do not have to be expensive. Even my most aloof, dignified cats will occasionally unwind with a favorite toy. Petting is an acquired taste among cats and if they were not petted when they were kittens they will not really enjoy it when they get older. Though they may come to tolerate it. Try rubbing his ears instead or scratching the base of his tail or under his chin. Some cats will permit this even if they don't like petting and stroking. Best of luck.

I think some cats are just like that. We had a ragdoll (type of cat if you didn't know and sorry if you did know and I explained wasn't trying to make you feel stupid) and when we got him he wouldn't come out of the guest room for about 8 months. Then one day he came out and then he was like a pocket cat (that's what I call animals that are all over you all the time) He was a really good cat he just wasn't sure about us. Maybe he had a bad home before ours but then we did find him outside.

Sometimes it's just their personality. And again as he learns to trust you more he will become the companion you want. It might be having you ex there that has him back under the bed. Our cat hides when my grandsons friends come over. They have never done any thing to her. She just doesn't like strangers. Some cat don't like change ether.

I'm sure that Bigguy will come around, although it seems as though that isn't going to happen any time soon. Some cats just take longer to get acclimated than others. My Leo had been that way too. He was a terror when I bought him home from the shelter who even growled at me and ran away for a short time. But as the years passed, the cat mellowed out and became gentler and kinder. My Mimi is somewhat different. I've had her for a year and though she's become somewhat friendlier, she is still rather fickle. She'll jump on my lap sometimes and allow me to give her a quick pat or two before her purrs turn to growls. She'll bite me if I insist on petting her. I have no idea of when she will come around either. So from my experience, I can only suggest that you give Bigguy all the time he needs to get acclimated. Doing so will try your patience. But you will be rewarded later on. All you can do now is let your cat adjust on his own terms and never stop loving him.