T.W.
I have been in your shoes, only my kids were much younger at the time. First let me start by saying, unless he's your husband he shouldn't be living in your house with you and your kids, Period.
As much as you might want that and as much as you think it's your life you can do what you want, just as much you have to set an example for your kids. Living together out of wedlock I am sure is not what you want your kids growing up to think is acceptable. I mean just like the old saying goes, why buy the cow if you can get your milk for free. You aren't going to get the kind of commitment you and your kids need if you allow him to live with you no strings attached. It's giving both of you the easy out if you need one. If you had no kids then I'd say hay go right ahead, but then the kids start getting emotionally involved with this person and attached and then for what ever reason you and your boyfriend decide the relationship is over then boom the kids are left abandoned too.
So, don't let him move back in. If you want the relationship to mend and continue then pursue it, but tell him he's not allowed to live with you anymore. You want to do what's best for the kids and that starts with both of you setting the good example. If he's a good man and cares for you and your children then he'll be on board with it.
Secondly, there's obviously some reasons why you kicked him out. You both have to work on those first away from the kids. I would suggest counseling, if you plan on making a life long commitment then I would suggest premarital counseling that is faith based if possible. You have to get to the root of the issue before you can start to heal from the effects of them.
It's rough at first, but if you both are focused on the best relationship possible it will work beautifully.
I was married for almost 10 years I had 2 kids one was 6 1/2 and the other was 4 months. My now ex husband came home one night and decided he wanted to see if the grass was actually greener in someone else's yard. We were together for a long time and this was devastating.
We were divorced and a few months later I met my now husband. I wasn't even looking and neither was he. We dated a few times for about 3 weeks and then we both got cold feet and didn't speak for about 5 weeks. At any rate, we started dating again. He loved my kids and they loved him, but we refused to move in together. I guess I should say he refused more than I did at first. He would come over and stay late, but always went home and was never there when the kids woke up in the morning.
We spent a lot of time together and always did things as a family would on the weekends. When we decided to get married we talked to the kids about it and we went to premarital counseling for months. We dated for 2 years before making this decision. We wanted to make sure that we had the most stable foundation we could have because there were kids involved. They were are and still are our main focus. I thought then what a pain all of that was and how I just wanted to be with him and everything would work out, but I can honestly say that what we did and the way we did it was the right way.
I can not ever imagine being without him and my kids have the utmost respect for him. My son who was 6 is now 19 and he knows the right way to treat a woman and how a relationship should be and that it's not all about the here and now or the physical aspects. Marriage and relationships are a commitment and you have to come into them prepared for the long haul.
Just take your time and really think about what you want and most importantly what's best for your children right now and then go get it.
Pray about it, and it will work out fine.
Good luck