I would suggest looking around for groups that have ideal music that you want to learn. If the music is boring, then you definitely aren’t going to find it enjoyable. In my local area, there are over 6 orchestras that are all at the advanced level. There are also many small groups that meet, and you can also form your own string quartet. If you are struggling with the passion of playing, it might just be that you need to experiment with other avenues. Just a thought!