Have you ever considered a 12-step program designed for such addictions? Do you see a therapist at all?
Sexual promiscuity was a big part of my life, especially in my younger years. Can't say it reached addictive proportions as I consciously used sex as a way to get the love, attention and other things I sought. It did, however, severekt impair my ability to have close relationships, as with you.
You first need to get a handle on your addictive behaviours and begin therapy (or whatever) to help deal with the deeper issues of "why." (I say deeper issues because it is apparent
what started this cycle of behaviour).
If you seek a 12-step program, please do not be frightened off by the spiritual aspect - no one is asking you to convert to anything - for this is a very personal aspect of the program and need (should) not be open to public scrutiny in any way, shape or form.
I wish you well.
Altered State