Here are three ways to help end moaning and feeling negative - they are focused on your partner, but are equally applicable to yourself:
1. Recognise that if your partner is moaning or being negative, they are feeling unhappy and are fundamentally lacking in love. This means they have lost their natural connection to love.
2. Your task is to inspire your partner to feel self-love. First find compassion for their internal suffering - they are in pain.Then appreciate them for the things you love about them. Pour love into and onto them.
3. Find some way to talk with them about their feelings, making it clear that you do not blame them for their negativity. Find out what need is not being met for them in the relationship or what they are worrying about. Own any of your own negative behaviour and apologise if necessary.