PSA: YOU'RE NOT BEING IGNORED.
A major part of the tumblr rp experience is refreshing the dash and see your mutual roleplaying with someone else. Or maybe they're answering asks, reblogging musing posts, making an OOC post here and there. However, there will be times where you are waiting on a plot, an ask, or a roleplay to be responded to and you see your partner interacting or engaging more with other people.
Again, the mind is a cruel thing. Inadequacy, jealousy, general anxieties stem up sometimes, it's part of being human. But what's important is how you act on these emotions. Please remind yourself that sometimes, things take time. Not all plots go somewhere. Sometimes, someone may not be feeling their muse for that rp. Maybe they just got really busy. Thousands of reasons, but none of them have anything to do with how much they like you as a person.
And that's okay. This isn't homework-- People should be allowed to pin down what they want to write and write it as they please. If you really want specific interactions, you can always send ic / anonymous asks to muses. You can make your own starter calls. Please don't put all of your eggs into one basket, as you will come to resent the people who don't immediately refill it. Don't be a goob, you have people who enjoy you AND your writing.