How can you become more emotionally available to your girlfriend?

If your girlfriend has emotional problems, listen to her. Get her to talk to you and explain what's going on in both her mind and her heart, because maybe she just needs someone there for her. If she refuses to talk, don't push her - just let her know that you're there for her and are around if she ever needs to talk.

If the problems get worse, maybe she should have one or two sessions with a therapist or someone of a similar job. They might be able to find the root of her problem and help her heal, since emotional problems are normally caused by an event, and not something you're born with.