JB,
I think we all go through ebbs and flows of interest when you're a 'hobbyist'.
I'm generally interested in 'old' music (was there anything made after 1982?). Having said that I still listen to some newer stuff - generally because my 2 kids ram it down my throat on Spotify or suchlike - very ocasionally find a bassline that grabs me (like Juicebox for instance). For me bass playing is a social thing, I still play with my trio but we're all mates also and go outto watch bands, have a drink etc - it's not just the music.
Like anything, if you ain't having fun, put it away for a bit, but it sounds to me like the 'practicing with a few mates' thing isn't giving you what you're after at the mo and you need to get out and do something else. Do some jamnight stuff fo instance - never enough bassists about, always full of widdling guitarists for some reason. Don't get too introspective about your playing, I'm sure you're a lot better than you think you are. I've been playing too many years and I still get lost going past 12th and I've managed to survive somehow.
There's a good jamnight in Rotherham town centre (Snafu) on a Tuesday night - you'd get a warm welcome,
Cheers, MTB