I think fake lashes (if applied correctly above the lash line with the glue not on your real eyelashes) are less damaging than waterproof mascara. I'd lose lashes daily with mascara removal but I rarely see any lashes come out when I use fake lashes. I use a mixture of coconut oil, castor oil, sweet almond oil, and vitamin e to remove my eye makeup and I use this as a serum at night for eyelash growth. It makes your eyelashes super conditioned and less prone to breakage and fallout. There is no solid proof it stimulates new lash growth (some people believe it does) but it ensures the lashes you do have don't get pulled out.
Obviously my first advice would be not to use fake lashes and use less mascara, or one that doesn't put too much product on your lashes. I have naturally long lashes, but I like them even longer and Vaseline does the trick. I use it every night, sometimes I skip and use it once a week haha.. But after using it for just one week you can see results.
I used to cut my lashes because they are naturally long. I didn't like how long they were. But now I stopped trimming them. Since they just grow back anyways and I get lazy to cut them lol I think it's genetics mostly.
I heard if you apply vaseline to your lashes overnight, it helps them grow. My friend is trying this because she wears false eyelashes as well, and now her eyelashes looks so thin. She recently tried this, so I'm not sure if it works. You can give it a shot.
I think it's for the biggest part, genetic. I, for example, have long lashes since my paternal family (italians) have too. But I've heard about new things created especially for this, you should try it ;)