One may be addicted to a relationship if one feels ashamed and therefore needing to propitiate - or if one fears abandonment, being rejected or being alone and therefore forced to be independent. But these feelings are suppressed, hidden from ourselves. Co-dependence is really emotional dishonesty, because we are suppressing our true feelings and substituting those of another. We lose our integrity and are stuck on our spiritual path. It needs dealing with!
Do any of the following apply to you?
By becoming conscious of our attitudes and perspectives, we can start discerning what works for us and what does not work. We can then start making choices about whether our view of life is serving us - or if it is setting us up to be victims because we are expecting life to be something that it is not.
An example. I allow my son to watch any program he wants on TV and miss my own favorites, because I'm afraid to upset him and I want him to love me. I've chosen to believe that he will only love me if I allow him to do whatever he wants. I realize now however that I'm his father, he loves me anyway, and my behavior is not actually going to increase his respect for me, in fact the opposite, and it isn't a good example to set him either [my positive learning]. I have my own right to watch my favorite programs and the TV is a resource we share, not to be dominated by one person. So now I choose to explain that to my son (assertively but calmly and with empathy, certainly not with anger or resentment) and in future we will have a better arrangement.
Empathic communication is always the answer, but remember that empathy does not necessarily require liking or agreement, it's to recognize and respect the other as an independent living being, with their own rights and responsible for their own beliefs, feelings and actions. And yourself likewise. That's what love actually is: unconditional acceptance. That quality is who you really are, your essential nature.
Co-dependence applies to perhaps a majority of people, so don't think there's anything wrong with you, so much as you've now started on a path of personal growth, so you can begin to switch these things around. Choose one of the aspects of co-dependence and start to put it right. Not all at the same time as that would be overwhelming, but choose one in which you feel you can take some positive steps toward changing your situation and your customary responses. If you can make some empowering changes, this will encourage you to tackle further areas of your life and relationships, and the snowball will be rolling. However, if it all seems too much, then get some help from a counselor, who will give you support.