How do I know if a butch likes me? signs?

Well don't know why you had to qualify that she is a butch because they are just like anyone else that would be attracted to someone. The "signs" that you are looking for are pretty obvious. The way she act's around you will let you know that she is interested. She will flirt with you, ask you out on a date (or surprise you could ask her), listen to your stories, and in general enjoy being with you hopefully you will enjoy her company 2! Good luck!