Another chance??

Please help me :( i dont know what to do... Ok so heres a quick brief of what happened. 
I had a thing with this guy, we decided to take things further and take things slow, but then he called when he got home and said maby we shouldnt it might be a bad decision. 
Then he begged for me back and so i gave him another chance... He then started ignoring me after a couple weeks for about 2 months and then he text me the other day saying he was really sorry and came over on saturday to try and sort things out. I think he was serious about it this time but i dont know if i can trust him again :( 
Should i give him another chance!!???? 
Pleasee help me :(