Hey Bella,
First I must say, I love your name. I find it a very pretty name.
Also, that's awesome you went two years without cutting! WOW! Slip ups happen, but don't worry you can start counting the days, months, then years again soon for when you haven't cut.
Things must be pretty terrible for you to start again after so long. Do you know exactly what caused you to start again? By finding out the reason we may be able to make it easier to cope with. I know you can do it again since you already did it once. Use the alternatives sticky at the top of this forum for other things to do when you feel the urge coming on. Don't feel guilty, just overcome this. That's great you have your boyfriend to look after you. It shows he cares a lot for you and doesn't want you going through this again. Don't dig a deeper hole for youself, fill it up now when it's easier to overcome. I know you can do it, just have faith in yourself.
PM me if you need anything or just want to talk,
Alessa