Hi, I need your help, your opinions from the outside would be greatly appreciated!

I have been with my (now fiance) for 4 years, he's slightly older than me and has two children from a previous relationship.

I have found that over the years he lies to me about money, the mortgage is in my name and I found out the other day that I have been giving him my half to pay the mortgage and he hasnt been paying it and hiding letters that have been sent to me in fear that I will find out....But I am the one who will get in trouble!!!!!!!!!!!! Ive also found out that he is in a lot of debt, he has so many loans yet still tries to get more...He's terrible wioth money and it scares me!!!!! Since he has been getting me in trouble with my mortgage (and I didnt know about it) he asked me to marry him and tried to get me to sign a declaration of trust to confirm what he would get should things go wrong (so he obviously thought that if I found out we would split..I dont know?!!) I dont want to live my life paying off debt and since I have been with him there hasnt been a year that has gone by when something bad financially has happened.

Also, he's not the most affectionate boyfriend and considering he lies to me about money and things that he has brought (and not just little things...One was a 15k van!) it makes me wonder if he really loves me.

I have confronted him and I have been staying at my sisters house, but I just dont know what to do. He says he loves and I really do love him, but now I cant trust him. We have fun together and he is my best friend.

Should you end a relationship with someone if you still love them?
Is money a good enough reason to end a relationship?

Please help me, I dont know what to do?