It's understandable to second guess yourself. I tried for years to lose the weight on my own, but it'd take me a YEAR to lose 20 pounds and a month to gain it back with interest when I gave up out of frustration. Eventually I had to face facts. I wouldn't be around to watch my nieces grow up if I didn't do something about my weight. I was 389 pounds when I finally decided to look into bariatric surgery. I'd been coming up with excused for YEARS as to why it wasn't for me. Truth was I didn't believe I'd have the willpower to stick with it. But, surprisingly, it's been relatively smooth.
There was this one girl in my bariatric surgeons office that comes to mind when you talk about backing out. She went through the whole process THREE times! She got right up to her surgery date and backed out and had to start all over again. I was talking to her in the surgeons office before my pre-surgery appointment and asked her why she'd go through all that and then not have the surgery. She said she was scared and then asked me why I didn't seem to be. I told her I'd gone through a much scarier surgery so this was like a walk in the park by comparison. I honestly don't know if she went through with it that time or if she's going though the process for a FOURTH time. Clearly she wanted to lose the weight, but the unknown of the surgery was terrifying to her. The unknown can be a really scary, I get that. But think of how much better you'll feel losing that extra 80 pounds. Who cares what your PCP thinks (vanity? pfft, a 37 BMI is still obese and your PCP is a friggin' MORON!) or if your mother doesn't approve, this is YOUR life and YOUR body! The surgery will help you become a healthier YOU!
In the end though, the choice is still very much your own. Whether you go the conventional dieting route or the WLS route is still your decision and no one else's. Maybe write out a list of pro's and con's. Or read success stories to pump yourself up. Either choice you make, I wish you the best.