Some of us, unfortunately, learn the hard way not to be too trusting of others. However, there are still good people out there who, to varying degrees, can be trusted.
Healing takes time, and it’s okay to take things at your own pace. Don't pressure yourself to feel better overnight. Small steps forward are still progress, and every bit of healing matters.
Focus on your personal growth through Power Meditation and Yoga. These practices serve as a cleansing process on its own, which will gradually heal you as you continue. Make them a daily practice, without exception. Over time, they will dismantle the mental walls you've built, elevate your spirit, and remove any blockages, as it raises your vibrations to a higher level. This will help release whatever that is buried deep within your mind and soul. Remember, this transformation takes time - so be patient, and never give up.
From experience, you can also use Spiritual Squares or Rune workings to clear any negativity associated with the energies governed by a particular chakra and its corresponding planet. This as well might help you heal faster.