I don't see any reason it wouldnt be ok to talk about stuff like this...yes its personal...but arent our feelings too?
From all I know depression has a BIG effect on our sex life for many . many reasons. So definitely don't feel "alone" in how you feel. Then when and if you get on medication for it...alot of them are also known to effect our sex drive as well.
This doesn't make you a "bad" girlfriend. My onyl suggestion as far as that is maybe make a conscious effort to express your love for him in other ways if sex isn't one of the ways you're comfortable with or enjoy too. If he loves you...I doubt he would really enjoy something that is supposed to be shared if you don't enjoy it too. Though I also undertandthere are simple physical needs too and it can be so frustrating.
Definitely be honest with how you feel so he can have a chance to understand for himself and not feel he is being rejected or is loved less or undesireable.
Im sure your depression has also effected your self esteem and your own personal feeling of being desireable...its hard to feel sexual when you feel your not desireable.
You mentioned being "satisfied" and not being able to achieve that....but really, Lady, thats so understandable when you have 80 other things on your mind. It isnt because there is something "wrong" with you. If you can't relax you cant possibly truly enjoy.
Im glad to see neither of you have pulled away from the other things that are so important in expressing love...the cuddling and being together. Its jsut as important.
Just do your best in trying to reassure him that it isnt him personally you dont desire. Ask yourself what it really is that holds you back from feeling pleasureqble when intimate...the real feelings behind it. Then maybe you can address those and start to have pleasure from it too. Your mind cant be elsewhere and expect what you do.
All I can do is reassure you there isnt anything "wrong" with you and to try and reassure him too.
DOnt think ive helped much other than to ramble...but you arent alone...I hope that helps.
Serenity