Is my relationship in trouble if I don't change?

My girlfriend and I will be celebrating our 3 year relationship we've lived together for a year now and last night she said something that's been bouncing around in my head.

She said. She doesn't know anything more about me than when we first started dating. I have an idea of what she means.

I'm a very private person and keep everyone on a need to know basis I don't lie to them but I don't give them the whole picture either. One of my pet peeves is when someone ask if I'm okay and I'm fine doesn't satisfy them.

For the record my version of I'm fine is I'm breathing I ain't in the hospital and I don't have Yogi trying to make me lunch. If someone pushes it I become a little agitated and will usually walk off silently.

Now I love my girlfriend very much she knows that if she needs anything I'll bend over backwards and do 3 somersault for her if need be rather it's just talking out a bad day at work or her depression rears it's ugly head.

I extend this action to everyone I care for especially her but she's nervous thinks sometime I might be hiding an affair or something with how secretive I am for the record I never have nor ever would betray her or her trust. I want to propose soon probably on our anniversary but I'd this continues I'm not sure what her answer will be.

Any advice would be greatly appreciated

Is my relationship in trouble if I don't change?
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