Hi,

I think three months is a short time in a relationship. However, if you feel this way, you should bring it up and talk it out with him. It doesn't sound fun being hidden in his life, and maybe if you do decide to be patient and give him some time, you should set a date as to when this should all stop. He shouldn't hide you 2 years in for instance. So only you can decide what is acceptable and what is not, and until when.
I hope all will go well.