This is something you should be speaking to your pastor about. You and your fiance. He can offer you counseling, guidance, prayer and the support that you seem to need regarding this issue. He can talk to you one on one so that you can open up to him, and allow him to find out more about what's going on with the two of you easier than someone on a forum can do.

The solution to the problem is, repentance followed by obedience.

Stop it lawrenceb. A lack of serotonin in the brain effects lots of people. Would you tell someone who is diabetic to repent and obedience because their body doesn't produce enough insulin? Thankfully, diet and exercise can control some of these symptoms. Endorphins from exercise can increase those good feelings. Pray your way to health. Jesus did everything for you already, just ask. Don't listen to legalism, telling you that you are not worthy.

having more faith in God helps in most things. it's not the problems thats messing your faith but theres issues with faith that is giving room for the attacks.

Eph 6:16 Above all, taking the shield of faith, wherewith ye shall be able to quench all the fiery darts of the wicked.

i hope that you can find the truth and faith in God that will give you victory over this.
God bless you...

are you living with other people goldbaby? and you going to church or actively seeking God?

Stop it lawrenceb. A lack of serotonin in the brain effects lots of people. Would you tell someone who is diabetic to repent and obedience because their body doesn't produce enough insulin?

When you buy into the dia-gnosis, you also buy into the authority who issues it. Rather, proper questions might be: What has caused the lack of serotonin? What has caused the insulin problem? These questions are never explored by the transnational drug corp.'s because there is no profit in doing so.