Some guys go the "classic" route with names like "angel," "darling," and "sweetheart"; some prefer food-inspired nicknames, like "cookie" and "cupcake"; and some straight-up worship their partners with loving names like "queen," "goddess," and "light of my life."
You are interested in this woman romantically. So make sure she gets to know it. But if she just wants to hang out as friends, don't start wailing over the phone and take up on her offer. If its meant to work out it will, so don't spoil your chances by refusing to be her friend.
a : a strong feeling of romantic love for someone that is usually not expressed and does not last a long time. ◊ The person who has a crush is usually young or is behaving or feeling like a young person.
Just be simple and direct. Say, "I wanted to tell you that I have a crush on you" or "I really like hanging out with you, and I want you to know that I have feelings for you." When you tell your crush, look them in the eye and relax your body.
If you're on friendly terms with your crush, don't be afraid of teasing them a little as a way of flirting. Make sure that they know you're teasing, being ironic, or sarcastic by adding in an emoji or an LOL—over text, it can be hard to tell whether or not someone's being serious.
Do Something Fun Together. Do something active next time you hang out — a hike, a walk on the beach, or a rollercoaster ride. Any experience that generates excitement and creates ~butterflies~ is not only fun but memorable too. Your crush will associate you with a good time and a fuzzy feeling in his/her chest.