CheaterCheater?

heeey'
last Saturday my boyfriend cheated on me, we had a huge fight i got angry like usual, but the thing was he caused me so much pain but i stayed with him. I don't know why either. I have trust issues, and i trusted him but now im not sure i'll ever be able to. Before he cheated we would always say we loved eachother, but now he says iloveyou and all i can say is ilikeyoualot.
Everyone is telling me im weak for taking him back. He's always saying sorry but every time he does i picture him kissing her over and over and it makes me sick.
i want to know is what i've down the right decision?
i need help
what would you have done please?