"I finally asked her out on a date and she said yes, so we’re going out for dinner tonight." "Well, have fun! Don’t do anything I wouldn’t do."
Because the hiragana ends with an う sound, you know this word is a verb. The kanji itself means invite. The verb vocab version is to invite.
Since this word consists of a kanji with hiragana attached, you can bet that it will use the kun'yomi reading. You didn't learn that reading with this kanji, so here's a mnemonic to help you: You saw so (さそ) much in this person that you decided to invite them to dinner.