Not every game stays in your interest indefinitely, if you do not feel it's worth investing any time into playing it, don't. Nobody is forcing you to do it. Despite the fact im still here, I've stopped playing actively years ago. But I make up for it with helping around the community. Theres plenty to do around here; tournaments, events, mapping, modding, skinning, helping around chat and/or forums. Mixing it up a bit always helps.