<human>: Throwaway account cause i'm 90% sure my BF knows my main account.

Okay, so to start off I'm a 19M in the southern US. Around 3 or so years ago after I got my own computer, I started to get really into the internet, and would spend hours at a time in a Skype group chat talking to some friends I'd made online. After awhile, I started to slowly come to the realization that I was bisexual. Apparently, my other friend (19M across the globe in Aus) was starting to realize the same thing. We started to get closer and closer until we finally said "fuck it, we're boyfriends now".

Things have been going pretty steady for the past few years. But now, I've been put under a lot of stress in my personal life, and I just don't feel as strong of an attraction to him as I used to. Within the past couple of months, I've noticed myself starting to get attracted to a girl (18F) on Tumblr that I met through a Homestuck group in my city. I'm fairly certain that she has a crush on me too.

The only problem is, the 19M guy in Aus is really invested in the relationship, and I feel bad because I don't feel like I could return those feelings. Right now, I feel like I need a relationship that's more intimate than just talking over a computer. I feel like our interests have started to segregate as well; he's really into MLP (yeah i know) and I'm not, and we hardly talk as much as we used to. And I feel like I have the opportunity for a closer relationship now. So, I'm not sure if I should stay in the relationship I'm in now, mostly for his sake, and not be as happy as I could be, or leave that and start a new one that has a chance to be the relationship I think I need. I'm pretty sure either option will leave him upset, especially when he finds out that I'm in another relationship so soon (he follows me on Tumblr as well as being friends on Facebook etc)

Can you condense the text into three sentences or less?
<bot>: 19M in **long**-distance relationship with another 19M, unhappy and wanting to seek new opportunities. What do?