I need an advice :(

so me and my boyfriend has been together for almost 5 years. We have an issue about sexting. I mean ive worked on myself and how I send sexy pictures once in a while to keep uo the spice. but then there are times that I'm not in the mood to dirty talk. I know its needed(?) to keep uo the relationship spicy. My bf and I havent seen each other for almost 3 months due to the pandemic. I know I should work on it but I dont know how.