My (24M) gf (24F) and I are currently, and have always been long distance. We're coming up on a year together which is very exciting and she is my entire world. As an anniversary gift I wanted to get tickets for us to both go see her favorite artist in concert as it is one of her dreams. Normally I like keeping my gifts a surprise, especially if they're big ones/really important to the person but she suffers from Borderline personality disorder, Bipolar 2 and anxiety so surprises aren't really on the table. She is also finishing up her undergrad in a very small town that is quite far from the large city that I'm staying in and travel is a huge bitch so we can't see each other as often as we'd like.

Considering she's not good with surprises and the fact that sorting out travel would definitely take some preplanning, I told her about my plan tonight and she was super excited because she idolizes this artist. I just got promoted at my job so I'm making decent money and told her I would happily cover the tickets and hotel for when she comes visit ( I live at home currently). She said she can take care of travel since the show would be in my city. We both then began looking at travel options for getting her here but they were all either really expensive (she's making minimum wage as a food worker on campus) or would take like 18 hours (for what would be a 6 hour drive). Concert would be on a Saturday night so the plan was for her to come Friday night and leave Sunday morning. We looked around at travel options for about 20 minutes before she became overwhelmed and began crying. I tried comforting her as best I could but she said that her brain doesn't work and that she's incapable of planning/thinking that far ahead and feels bad she's screwing up the gift I wanted to get her. I told her that she's not messing anything up but she kept crying and went to bed for the night.

This has unfortunately happened before when we discussed other plans such as potential visits to each other or potentially moving in together since I was working remote at the time and the area she's studying has a low COL (can't happen now since my promotion came with a permanent in office position). Once we'd start getting in the weeds of planning stuff she would rapidly become overwhelmed and begin crying which would halt all progress and lead to me having to comfort her (which obviously I'm happy to do). It's led to a lot of plans being scrapped or just not brought up again for fear of upsetting her again and it's been very sad and a little frustrating to deal with.

I love her so much and it kills me seeing her like this and losing out on opportunities to see each other really sucks because we're so far away and see each other so rarely (October was the last time). She's currently on meds and doing occasional counseling but goes through frequent depressive periods where she stops taking her meds, then starting them back up again which always messes with her. Wondering if anyone maybe has some experience with anything like this and can potentially recommend some coping mechanisms on either of our sides to alleviate some of the emotion and frustration from issues like this?

Any and all advice would be greatly appreciated.