I broke up with my girlfriend. Will he call you back after he sends the message?

Whether sending a message to an ex-girlfriend after breaking up depends on many factors, including the reason, time, the other person's emotional state and her personal wishes.

If there is no serious incident or conflict when you break up, and the break-up time is not long, she may reply to your message. But if there is a big contradiction between you or she is indifferent to your feelings, then she may choose not to reply to your message.

Whether she replies or not, you should respect her decision and feelings, and don't force her to reply to your message or exert pressure. After breaking up, each other needs time and space to deal with their emotions, so you need to accept her decision and respect her personal choice.