That major isn't even hard. It's a dime a dozen in the pre-med realm and will give you absolutely no advantage over someone with a comparable GPA in General Biology. If you want a major that would be considered difficult under the "life science" umbrella, you have to at the very least ascertain Bioengineering, Bioinformatics, or Biotechnology in your conversation which by the way are far more employable in case medical school doesn't work out.
Any major will give you a good shot at getting into medical school so long as you do well in the pre-reqs and have a high GPA. Some schools such as Rocky Vista also look at your performance in upper division biology classes so don't let what you "love" be that double-edged sword that keeps you out.