Nox, it sounds like you're just frustrated. You're not losing interest but I think you just need to come to terms that the fandom is limited to whatever you see on your computer screen at home. It sucks, I know. You don't have to quit on the forum, fandom, and the roleplaying, but there's only so much available when given the time and resources.
Yeah, you could try drawing the art for people, or slowly making your own suit or saving up for one. If you like furry art, you can check out furry art sites, talk with artists, talk with writers and get tips on how to create something of your own if you don't know already. The fandom is definitely something that requires creativity and the will to like creating. Fursona picking and creating can be difficult but it's not impossible. If there's someone you like in RL or a fictional character you know of that you're a fan of, base your character off him or her until one day you decide that you might like something better. For example, my fursona's based off of me.
<--------------Look at him! Those are my clothes he's wearing!
If you don't think you can keep up with the conventions or fursuiting, then accept the fact that it's not going to happen any time soon. To me, the fandom is nothing more than an online passtime where I can look at art and talk to the people I love when I have the time. I have different hobbies I can't live without. I like dirtbiking, racing, videogames, and playing guitar. The fandom's up there on top with those things but it's not something I"ve dedicated my life to because I know it's such a hard hobby to make happen in RL (I can't afford a suit or plane tickets to fly to every convention, nor do I care enough about it to spend that kind of money on it). If you absolutely want to stay interested in the fandom, you WILL find a way. There's got to be something about the fandom you love if you don't want to give it up and keep doing whatever that is.