couple of things here...
Home number issue
If you were seeing this bloke a couple of weeks, why on earth would you expect a home number? There are ALL SORTS of crazy on the internet, perfectly understandable.
You coming up with the what if anything happened blarney as a motive to get his home number, TBH if I were him, I'D have run for the hills.
I've been seeing someone for 2m, 'known' him for 3m, only last week did he get to come see me at home. I've not slept with him yet, we're taking things slowly. As it goes, he doesn't have my home number, but if he asked me for it now, I'd probably say OK. I'm going to his house later for the first time. ATM he still has my dating mobile number, not the main contract number, but that may change soon too. Have lost my job and running 2 phones is £10 a month I could save.
condom issue
Run for the hills, that's not good enough. If he has a hang up, he fixes it. He has been out with 7 women and slept with them all? then so will you have slept with them all and ALL their former partners if you sleep with him bareback.
You/STBX
I'm prepared to be flamed corrected, but tbh, I'd not trust a bloke still living with his ex. I'd suspect that there could be blurring or boundaries, and certainly it's still an emotional mess somehow. As such, until you are ON YOUR OWN, you are still emotionally attached, you are not free, and therefore bloke you attract that are OK with your set up may be only interested in a shag. You both seem to be rushing it a bit, considering.
I don't think you are in any way ready for this relationship, or any other tbh, you have HUGE amounts of baggage in the shape of your H, I worry that you have not exorcised the hurt/self esteem issues that a failed relationship ALWAYS manifest, and therefore are come across as grateful that anyone is interested in you.
You need to bin this guy, the condoms is the main reason for this. You need to BACK OFF dating ideally until STBX leaves, or you do.
Then you need to heal, process the split. ATM you are using dating as a sticky plaster, to help you get through the end of your relationship. That will tear you up.
Until you do this, you will be sending out a homing signal to all chancers, male defects and NSA guys, when you really are in the last mental place you need to be to deal with this kinds of pricks blokes.