Chastity in vanilla life discussion

Hi there, This might not be the right venue for this sort of question, but here I feel comfortable discussing sexuality. I am together with my girlfriend for five years, and most of the time we have been living together in a condo. Now she is working in a different country for 3/4 a year in two sittings, one shorter, one longer. I can go and visit her, but since that requires a flight and renting a car, I can only do this once a month, and my plan is on going it every two months such that I have 6 weeks alone and two with her. She will be here for two months in a bit over a month, and I have had a month without her now. She is now quite busy working, however in my life there is something significant missing now from day to day. Things like having breakfast together, cuddling and also sex and fetish play. In order to compensate for the latter at least a bit, I have set up a secure messaging app on both our phones such that we can exchange kinky messages. My hope was to play »online keyholding«. We have exchanged some messages in the past weeks, and I have continued to break in my chastity device. Longest time before she went away was like six hours. Now I am at 48 and keen on pushing this to a week. Right now I have a serious chafing so I take a little break. In the last couple of days I have not received a direct message from her. Also in the kinky chat app, the last message is not even read. Since she is quite busy there, I can understand it. And I likely went overboard with kinky messages (asking for her to specify a lock-up time with the kitchen safe, talked about things she could do to me when she got back) and she is now annoyed by it. This would not be a new thing, I annoy her with it also when she is here. I feel abandoned, and I realize that this is an overreaction and does not remotely reflect her intent. She is busy and instead of filling the void with friends who are around me, I pester her with messages and wanting replies. However, sexuality is nothing that I want to do with somebody except her. So I can either decrease my sexual needs or find some other valve for it. Problem of course is that the more I play with chastity, the more aroused I become and the more I want her to send me kinky messages. In principle she could just send me message like on a captioned Tumblr image per day and I would be happy. Perhaps the right question to ask is what I could do to make sexuality alone more satisfying. I already have (also long before she left) a habit of browing Tumblr for images that I like. Then I sometimes watch porn video. There are some anal toys, I have a chastity belt with a kitchen safe. So plenty of things to play with, I’d suppose. But just locking myself up for 48 hours is not that thrilling. But with a message like “Yes, I want you locked up. How long was your longest so far, 48 hours? Well, then do 52. Now go!” it becomes an arousing quest, yet I seem to have to do without these messages. I also thought about writing short stories and publish them here or on Literotica just to foster my fantasies. Do you have suggestions what I could do to make me less dependent (and therefore less annoying) on her input but still maintain the »locked for her« narrative?