I'd appreciate some honest opinions on this.
Me and ex-P split up a few months ago, he moved out about a month ago, and things are just horrific. He says that he has nothing, whilst I have everything (our 2 DDs live with me, I have stayed in the house as I can afford the mortgage, and he can't, I get that's difficult for him but better than uprooting DDs. I also pay for everything, apart from a very small amount he gives me for maintenance). I am buying him out of the mortgage, giving him more than I need to, but he was so concerned about finances that he was saying he was not going to go, so this was a way of encouraging him to move out (both our names are on the mortgage). In terms of the girls, I have said that I want him to be involved as much as possible, so am trying to be as flexible as possible (within reason) to mean that he can be with them as much as he wants to be.
He suffers from depression and anxiety, and I know this is really difficult for him, but he just seems to be hurling abuse at me. All the time. He comes round, spends maybe half hour to an hour with the DDs, then leaves. He's checked my texts, come round and woken me up at night, told me on several occasions that he'll kill himself if I don't get back together with him, and still almost 5 months after us splitting up, keeps questioning me about why we split up, pretty much every time we see each other.
Because of the depression (I think, though he's always been like this) his moods are very up and down, so he's not consistent with DDs and can't cope if either of them have tantrums (they're 3.5 and 2). For that reason, I don't feel like them going to his is a good idea, as at least if they're here I can go out for a short while to walk the dog to give them some space, but be back within enough time if anyone is kicking off. Also, he's a really heavy sleeper, and when we together, he never woke up when either of them woke up in the night, or first thing in the morning, so I don't feel like it would be safe for them to stay over at his (to be honest, he's not pushing for this, or to have them round to his, he brings it every now and again and I say 'ok, let's talk about it', but then he doesn't mention it again). He complains about seeing DDs here, but doesn't take them out anywhere (and because I don't know how it's going to work out for them, I don't suggest it either).
He says we split up because of his depression. I say that made it worse (because of how he was with the DDs) but the issues that we split up over were there before the depression.
My question is, in these circumstances would mediation be useful, or am I setting myself up for (even more) problems because he'd be expected to have DDs a couple of nights a week? I'm scared about going down that road because of what I've said here, but not sure how it works. I just don't know what to do for the best.
If he was more rational, put DDs needs first, and was able to meet their needs, I'd be more than happy for them to go to his/sleep over etc. Then again, if that was the case, we wouldn't have split up.
Sorry for the long post, thanks in advance for any suggestions.