I have made myself accountable to a few people online and off. I have stated my intentions to them. They encourage when they think they need to. They help me toss around ideas. And they weould all be ok if I just enjoyed taking photos. They would be alright if I kept listing them in my Etsy store. They would be ok if I put them on flickr to share. They would all be alright with all of that if I hadn't told them that I want more.
I push the evelope, I put myself out there, and I always state my intentions to my support group. They support each and every step and they cheer me on.
I guess my point is that your support group can only be supportive as you allow them to be. They can only give you the ideas and answers you are looking for if you ask. If you tell me your significant other is not supportive, I'm likely to ask if you've talked to that person about exactly what you want to accomplish. Have you stated your goals? Have you reasoned it out? Have you *asked* for advice, help, support?
Try it... stick your neck out there, be vulnerable, devise a plan, talk it through... state it to those important to you. I bet they will be a source of inspiration and encouragement.