Hi.
Please, google "No more mr. nice guy pdf" and "Toxic parents pdf" -> they are two great books available online for free that helped me tremendously. Do the exercises therein. You remind me of myself from a few years ago. Those books, therapy, ..., helped me tremendously.
Please, try to read the first 10 pages of both books over the next few days and let me/us know what you think about them. Ok? :)
Next, please talk to a GOOD lawyer (preferably someone with experience in fathers' rights and such cases as yours, where a spouse doesn't adopt the child) about what you can do to legally ensure you can continue to have contact with her son. I know in my country it's possible to get visitation/contacts with the child of your spouse if you divorce, even if you never adopted the child and if the (ex)spouse opposes, if the court deems further contact/visitation is in the child's interest. Now, if you're in a country/state where you can't get a legal right to visitation, please ask your GOOD lawyer to be creative about what you can legally do if her son wants to remain in contact with you. For example, if her son wants to remain in contact with you despite his mom's opposition, are you legally allowed to communicate with him through e-mails if he continues to email you from school/library/...? What can the mom do to stop that? In what way can you set up a trust fund for the son (for example for college) to ensure she doesn't get any of the money, and in what money can you inform the son about this? When can a child/teenager legally decide whom he wishes to talk to over emails, skype, visit,...? 14, 15, 12, 17? Can you set up a trust fund to cover his therapy sessions if he'll choose to go to therapy once he'll be old enough to be able to legally decide for his own medical decisions? Can she legally prevent you from being part of the church/church activities she and her son go to, or her son goes (maybe sports activities organised by the church)?
Basically, if you want to remain in her son's life, there's a gazillion ways I can think of that might work IF her son will want to communuicate with you, either now or when he'll be older and will be able to understand what happened etc. You don't have to give up on having a relationship with him.
You too can get creative - you can tell him that you will write letters for him, make videos with advice for him etc.,..., that will be kept by your lawyer etc., and that he can get them when he'll be old enough to be legallly able to decide. Tell him that once he's old enough, to please contact you, even if it's years from now.
So even if she moves away (which I don't think she will, considering her family,..., is in the area, if I understand), there's so many things you can still do that sooner or later you will be able to have contact with him, if he will choose to. And even in the mean time, you can still put your time, energy, money,..., towards helping him have a better life now or in the future (like I said - trust fund, letters/videos with advice, pictures of you and him, of you, ...). You can create a public website, youtube channel,..., and give him the www address on it. You can post stuff on there (sports, music, advice for young people,...) that will seem to be for anyone, but he'll know it's your way of thinking about him.
Don't give up on him. He's the only father he truly knows/has. And to continue to be a great role-model and positive influence on his life, you do not have to remain with her! Don't let her use her son as hostage against you.
And remember - unconditional love is not healthy between adults -> don't let anyone convince you that you "promised" you with be with her. No one should feel obligated to stay someone who abuses them, steals from them, cheats on them. Unconditional love is not healthy. And even with love towards kids -> while you can and probably always do love your kids no matter what they'll ever do, that feeling of loving your kids must be separated from your relationship with them, i.e. you don't allow them to steal money from you for drugs, you don't support them living a life of crime, you don't allow them to live in your house with their lover and cheat on their spouse.
We're here for you.
Best wishes
[This message edited by HobbesTheTiger at 11:28 AM, April 26th (Tuesday)]