Don't Let Me Down

I certainly can relate to this song. The meaning is simple actually she's enjoying a beautiful day and feels this is too perfect and suddenly remembers how her significant other messed up. her mate cheated on her several times; however, she took him/her back, and is trying to forgive them. Seems like towards the end the mate has regained her trust, and she is pleading not to let her down again. cause it might be the last time