Liz Johnston airs her thoughts after splitting from her long-term boyfriend, Brice Bolden, during 7 Little Johnstons season 14. Speaking through tears, Liz explains how although Brice is a “good guy,” she “couldn’t be in a mediocre relationship.” The new 7 Little Johnstons episodes arrive on this March after fans haven’t seen the family for some months. Elizabeth, Amber, Trent, and co were last on-screen this past June. Since then, many things have changed for the family, but TLC fans are only just seeing the updates on their relationship dynamics. Liz addresses Brice splitAfter many months aw…