zennie,
Relationships are supposed to be two-way streets. A healthy relationship should enrich your life adding happiness, not sadness and despair. If you are depressed, see a physician. You might need an anti-depressant medication to help get through this. By getting the right help, you will be able to take better care of yourself and make some decisions about your future that will improve your life.
Youthful love is...acceptance, security and physical satisfaction.
Mature love is...a shared vision, common goals and interests, respect, companionship, honesty, trust, faith, and needing to spend more time with the person that makes you feel complete in every imaginable way. It is a meeting of the heart (or body), mind, and spirit (or soul).
I hope this helps point you in the right direction and you seek help soon.
God Bless,
~ nmpb ~