I’m not attracted to other girls, but Idk This is just my personal experience. Some do’s and don’t’s:

Don’t treat telling someone you have feelings for them as a confession, It has to make sense, make sure it’s not out of nowhere. Showing someone you love them matters more than telling them Imo.

Do make sure that if you and your crush have some interests in common that you have been using that to spend more time with them, one on one. Show them you value the time you spend with them.

Do listen to them and remember things about them, but also talk about yourself, see if they remember things about you.

(I’m basically saying, be kind and genuine, show them you love them and make sure to see if they’re also putting effort into the relationship before you tell them)

If they share the same feelings, yey good for you guys, but if they don’t then that’s okay too.