Dragonlayer said:
A once close friend, who trusted me to the extent that they shared some deeply sensitive issues with me and I did everything within my power to help them through it, even taking time off college at their behest, has spent the last few years completely ignoring me, bar the token
"Oh I've been so busy lately!" email. Despite this, they come online on Steam on a daily basis, fail to contact me like they promise and never once asked if I had any life problems or issues of my own they could help with. Even back when we did still talk on a regular basis, it was effectively me talking at length to a brick wall that occasionally said "

", as I always felt a responsibility to help take their mind off their rough patches (despite some seriously fucking miserable times for myself that I could have used a friend's shoulder to cry on).
I believe social media, maybe internet activities have exposed a lot of lies people create and often just can't defend because they exposed themselves. The, "I'm so busy", has been used on me lately and it's utterly pathetic when you then see said "busy" people, post pics of parties and fun they are having (yay), seeing that they are very active on internet activities like forums, games and whatever argument/debate they are getting into and of course IM like WhatsApp where you message them saying hi and how are things, them being online, ignoring your message, then reading your message and then no response. Two blue ticks meant you read the message you dumbass.
You know what, saying all of that, often times you just have to let it go and let them do whatever. You may have tried everything to keep in touch. Messaged them, asked how they were doing, invite them to go out for coffee or a drink, but if their repeated excuse is "I'm so so busy" and yet it kinda shows otherwise in the things they put up, post and broadcast, then just stop. It's mentally not healthy. Trust me. Then again, you don't have to trust me at all. I know you are not looking for that person to drop everything to focus on. All you are looking for, and maybe nearly everyone would agree with this, is some sort of acknowledgement that, "hey. I am here too, I don't want to be forgotten".
Friendship, especially close ones, are meant to be a two way connect not a one way link that leaves one person feeling left out and shitty and the other having all focus on them. That goes for ALL relationships really.