i think this song's about someone who spent their (twenty years of) life casually dating, thinking they had their entire life to settle into a committed relationship. they probably reached a point where they find that all their friends are in relationships, & they're on their own, kind of "alone" since their friends are all off doing their own things in their relationships, & they panic that they might be alone the rest of their lives. when you reach your 20s & you're on your own, you start wondering whether you'll find somebody who's right for you, & start wondering if you should just go it alone & start leading your life solo. rather than "build a house on your own," you might opt to just "give yourself away" in an effort to find somebody, anybody, who'll keep you from being alone. the song is saying, in a sense, that it's not so horrible being alone ("heaven forbid you end up alone"), & that instead of just trying to find any random person to spend your life with, just hold out for the right person for you.
i think this song's about someone who spent their (twenty years of) life casually dating, thinking they had their entire life to settle into a committed relationship. they probably reached a point where they find that all their friends are in relationships, & they're on their own, kind of "alone" since their friends are all off doing their own things in their relationships, & they panic that they might be alone the rest of their lives. when you reach your 20s & you're on your own, you start wondering whether you'll find somebody who's right for you, & start wondering if you should just go it alone & start leading your life solo. rather than "build a house on your own," you might opt to just "give yourself away" in an effort to find somebody, anybody, who'll keep you from being alone. the song is saying, in a sense, that it's not so horrible being alone ("heaven forbid you end up alone"), & that instead of just trying to find any random person to spend your life with, just hold out for the right person for you.