Okay, I might be newer than you (started around august of this year), but I feel largely the same. I feel like I'm such a slow learner. Thankfully my teachers and partners are rather patient with me, and I'm not planning to like ever be competitive or anything. One of the older guys in the dojo once said "Sometimes it feels like people forget everything they learn as soon as they hear 'hajime'."

So, you're not alone. The fact that you haven't given up yet is the most important thing. I believe you, like me, will get there eventually. That same old guy has often told me "Judo is a lifelong curriculum." I've been talking with another judoka online and she only took like a month or two of lessons and already is much better than me (unless she's just lying but I don't think she is). She got a headstart on athleticism and knowing how to move her body from playing sports in high school, while I was a theater and band kid.

Sorry, kinda got off on a tangent, but I guess what I'm trying to say is whether you are walking slowly up the path or are able to bound ahead of everyone else, the most important part is that you are walking it.