Rubish info from your friend!
Your lo is getting bigger and growing so chances are your lo needs the quantity in both breasts to fill up. I started my dd on one side when she was wee and then switched to both sides, plus with using both sides your breasts will produce more milk as they are going a shorter time period between feeds (3 hours vs 6 hours). Just be sure to rotate which side you offer first.
It's great to hear that you are enjoying the experience after a rocky start. It gets even better with age, my dd will look up at me, gently touch my chin and my hair now, it's such a sweet experience.
You will probably feel less full than in the beginning as the breasts get accustomed, but still no need to worry. For the most part, the way we "dry up" is by not taking care of ourselves (not drinking enough water, etc) or by replacing feeds with formula or supplementing. During growth spurts I would recommend following their cue and going to more of a "feed on demand" so that your supply can keep up, otherwise the 3 hour easy (and later, the 4 hour) works great.
