How much affection from a child is too much?

I have an 11 year old son who stays with me on a weekend & I also see for a couple of hours 2 nights per week. He has a rare medical condition which means he cuts & bruises really easily. It is hereditary & it was passed down by me. Because of this it made me & his mum a little more concerned over him & we had to watch him more. His mum had post natal depression & due to the thought of him hurting himself she suffered from anxiety.I separated from his mum 5 years ago & one reason was her parenting did not match mine & it caused friction. I wanted him in a bed time routine which I took care of but she would allow him to come down stairs if he asked. This was very frustrating. I would try to chastise him & she would tell me not to in front of him. This is just a few examples.He is still sleeping with his mum & up until a month ago he was allowed to have a baby bottle to drink from. When I pick him up she tells him that she is not going anywhere & staying in which I do not agree with. Things like this I believe are not allowing him to mature as he should be & I am worried it's going to effect him especially as he starts high school this September.I phone him at 7:30am every morning then at 7:30pm & 9:30pm. He has this habit of having to say I love you a certain number of times along with another few cute sentences that he has always said from been younger. When he is in my house he is constantly giving me kisses & saying that he loves me & I can tell he does this so that i will say it back. When he spills something or behaves badly he will apologise then cry & say I am scared that you don't love me any more to which I explain that I will always love him. I do not mind all the attention he gives but in the back of my mind I am afraid that he is developing some kind of codependency which I think I suffer from slightly.Should I worry? Any advice please? Thanks. via /r/Parenting https://ift.tt/2JjXXWr