<human>: I consider myself a jealous person. I've been that way in all my relationships. Because I'm aware of it, I am able to control myself externally 95% of the time. However, jealousy is something that still kills me on the inside. I want to go beyond just controlling my external actions and work towards changing the way I think. 

In addition, I get very fearful of the future and of life changes because I desperatly don't want to lose her. A co-dependency has started to form and only exacerbates my fear of the future. I read about how SO's will cheat on each other, breakup out of nowhere, and I start realizing these things could easily happen to me. Paranoia sets in. These relationships that are the most important thing to me are the most fragile...and that is something that is hard for me to cope with.

Do you guys have any advice on how to deal with this?

Can you succinctly summarize the text in 1-3 sentences?
<bot>: I tend to be possessive and co-dependent in my thoughts about my relationship and need help being a better partner/person.