Psychologists have actually proven that happily married people (i.e. people who are a good match for each other, neither person being a sociopath) are in better health physically and emotionally than their unmarried peers. When I started dating my husband, my health improved; my doctor said "you need to keep him around, he's good medicine!"
I sincerely hope that things will work out for you and this guy. Don't be afraid to be happy, and don't sabotage the relationship by telling yourself "I feel too good, this could end any minute."
One of the reasons marriage helps people have better health is as follows: People who are in a committed relationship want to be their very best and give their very best to their partner. This prompts a person to be more compliant with medications. Plus, the happiness factor and elevated mood are physically beneficial to your body. Couples who laugh together have even better health.
Sounds like you've found someonoe who is a good match for you. I'll be praying that you'll know exactly how to proceed in this relationship.
All the best!
Lauren