Hi Ben
Try not to overthink everything easy to say I know! But just tell your girlfriend how your feeling, good or bad. The worse thing you can do is bottle things up and keep it all inside. All that does is make you more anxious and unhappy and makes your girlfreind feel like she is doing something wrong or worse thinks everything is her fault. Keep the lines of communication open at all times. If she knows how your feeling its easier for her to help you. Believe me its much nicer to have someone by your side when your going through troubled times. Keep positive. My husband can be super hard work but worth it and I know he wouldnt have done so well over the years if he didnt have me to lean on and love him.