Hey guys, heres the deal: I have been playing in a band for almost 4 years now, but have only been playing bass for 5, and now i have a dilemma: all of my basslines (some decently complicated) have been taught to me by the songwriter/guitarist (15+ yrs experience)with very little of my own input. I feel like i have mastered 15-20 phrases of a foreign language without knowing little if any mechanics of the language. From the outside i look good--and have even been complimented on my playing at shows, but i feel like i dont know much besides the fretboard and trying to follow root notes. Now, i want to improvise, contribute more, develop my own style, and be able to hang in a "jam" but feel really stuck, absolutely limited, intimidated and frustrated. Where should i go from here? Thanks in advance!