Other people knowing him counts for NOTHING, unless that person is a partner.
Don't be rushed, if you think you're being swept off your feet, if you're not in full control, STOP.
Don't introduce children too early, give it at least 6 months.
Don't be complacent, don't think this can't happen to you. You've said yourself that you have form for this.
I escaped a 10 year abusive relationship a year ago, i've done the freedom programme, group counselling , and therapy. I know all the signs for crappy relationships, i acted on my instincts, ended the recent 'thing' but he's not taking any notice. I'm seeing a different side of him.
I'm sure his friends wouldn't have said he'd have to have the police on him.
Go slow, make sure he's worth it. You are worth a decent man, and your child needs a decent person in his life. Take the interviewing phase seriously.