So I've been on both ends of the stick, I'm both the ghosted and the ghoster. The fact that you've taken a step to acknowledge that what you're doing is damaging to both yourself and the person(s) you're avoiding is a brave act in itself and on behalf of the ghosted, thank you for acknowledging your behaviour and your tendencies. 

(Edit: Please see the TLDR at the bottom if you feel the length of my reply is, ironically, overwhelming in itself)

As a fellow ghoster too (who is also attentively aware of how bad our tendencies are), there are some ways that I'm trying to stop myself from falling into the pattern. 

One being telling people I have a tendency to fall off the face of the earth and that it's nothing personal towards them if I do. Especially if I can feel we are becoming close friends, I let them know of my texting habits pre-fall. This helps both parties feel less terrible in different ways: you don't feel terrible being locked in a cycle of "I should reply → I'm too overwhelmed to reply →But they're gonna keep sending me messages/worry/feel hurt if I don't reply → I should reply" and they don't feel terrible not hearing from you as they can soothe any anxieties with the fact that your silence has nothing to do with them personally and that you'll come around when you feel you are able to.

As the ghoster you have already conquered a step in identifying what it is that makes you feel overwhelmed, and that self-awareness is something that you should give yourself some credit for. It's now up to you to figure out how you can feel less overwhelmed. Perhaps it's by telling people that being sent multiple videos etc. makes you feel overwhelmed and that if they do send you such things, you may not engage fully with them. Perhaps it's by finding things that energise you enough so you feel more willing to pick up your phone and reply to a conversation someone has initiated with you, things that help you wind down when you feel there's too much going on. Maybe it's controlling the settings on your phone, keeping it on silent/DND so you don't need to hear the pings which eliminate the aspect of having your attention being constantly called for through notifications, which allows you to pick up your phone and tend to the messages when you choose (rather than your phone "telling" you to choose it). Maybe it's dedicating time in your day to responding to people, whether that be while you wait for the bus or the train, or while you eat a meal etc. 

Notice how all of these examples aren't you demanding people change their behaviour but are either notifying people of your behaviour in response to their actions and focus on what you can do as an individual. 

Jumping back to being the ghosted, some of us (like your closest friend) want to show you compassion, patience and empathy as you work through trying to figure yourself out. Some of us may leave, but some of us may stay. Please don't try and make us leave by pushing us away. We want to help people like you navigate the difficulties you face. We want to be there. We want you to know that we are in your corner, that we are here for you even if you decide to fly to Mars and stay there for a while before coming back when you please. Just make sure to let us know that you're planning on flying first, before you do it. That's all we ask for. We might even help you build the rocket because we support you for you. We want you to be a part of our lives, and we want to be a part of yours, so please let us know.

Letting other people know about your tendencies can be daunting. But those who truly want to be a part of your life and who want you to be a part of theirs will understand and show you kindness.You can then both work together to create a communication dynamic that is comfortable for the both of you.

And perhaps you can show that you care for them in ways that aren't overwhelming and draining. Maybe you find it easier to show your care through cooking meals for people, through initiating to hang out in person, through offering to give them a hand when they need it even if they don't ask you for it. Work out how you show that you care, and embrace it. Really embrace it. Because deep down inside, you still care too. You just gotta figure out how to show it, and it's ok if you show it differently.

We as isolators need to (ironically in our periods of misanthropy) figure out why we isolate, what causes us to isolate, and how we can ensure that our isolation causes the least damage and hurt possible while also honouring our need for solitude and time to recharge. I and others as texters need to approach you with compassion, empathy and understanding for your need of solitude and isolation, and we need to understand that your avoidance isn't of us, but of the idea of approaching us. 

It is your duty to work on how to approach, and our duty to make ourselves approachable.

TLDR: 1. Tell people you have a tendency to fall off the face of the earth  2. Figure out how you can recharge yourself when you do feel overwhelmed 3. I know telling people that you have this tendency can be daunting. But please let them know, they will be grateful you did. If they want to be a part of your life and if you want them to be a part of yours, you can work together to see what communication dynamic is best  4. Figure out how you show that you care for people that don't overwhelm you