Some boyfriends like to call their girlfriends "little idiots". Perhaps it is because their girlfriends sometimes do childish things that they are given such a nickname. Does it feel particularly sweet? However, such nicknames can't always be said, especially in some formal workplaces, and you must not call your girlfriends like this at will.
You can try to add the word "er" after your girlfriend's name, such as chick, which is more intimate. It can be said that it is a name that belongs entirely to relatives, and it is also sweeter to interact.
Many boyfriends directly give their girlfriends the nickname "sweetheart", which shows that they love their girlfriends all the more. This is also very atmospheric and not tacky.
Couples sometimes do some sweet interactions. For example, many people like to give each other some cute nicknames now, instead of calling their girlfriends dear as they are now. These nicknames have become commonplace. Nice and chic nicknames can enhance the feelings between male and female lovers.