Don't worry about it most girls are like that with other boys but it doesnt meen that there is something going on between them and no its not wrong to get jealous of them x

Get one of your mates to ask him for you tell her/him to say that you really like him good luck

All I can say is you will need to get him a mate if you have separated him from his family try to find the guinea pigs he lived with if you can if not just get him a mate to play with

By adding boiling water to it