Understand your role in the band. If you're in a rock and roll band, regardless of subgenre, chances are your role is that of "support". You will hopefully get your moments to stand out, maybe even take a solo, but accept the fact that the singer(s) and guitarist(s) will get the spotlight, glory, and blowjobs.
Now that you've done that, learn what it means to provide support. You will add to the overall sound of the band in subtle yet important ways. Pad chords under the verses and chorus, filling things in and making everything sound fuller and better, counter-appegios against the guitar(s), Hammond to fatten the sound during power chords, but unless people are specifically listening for it, nobody even realizes there are keyboards. During softer parts, the "pretty" parts, add strings and/or piano for great effect. Occassionally, someone will actually say "Hey, that sounds nice there what you're doing!" Enjoy it, because that's all you're gonna get for a while.
Does this all sound pretty cynical? Probably. But it's where I am right now, and honestly, I'm happier now than I've been in years because I get to do amazing, incredible things musically, and I know what I'm doing, and it sounds great in my ears (Aviom monitors for the win), so I just enjoy getting to play. I'm tired of trying to keep up with guitars, which by their very nature have a more powerful, more "rock and roll" sound, and tired of arguing with the sound man over whether or not actually hearing the strings during the chorus is important. Fuck it. There are things you can't control. Enjoy playing what you play, knowing how awesome it is, and if others never hear it or just don't get it, it's their loss.