Im always feeling guilty and like theres no one there to help me.?

im 14. i moved where i live in december. i started going out with my boyfriend in february. we are still going out. something bad happened in april, i cheated. i told my boyfriend what happened kind of. my counsular told me to tell him what he needed to know. so i did,. everyone started finding out about it, and starting stuff. so we broke up for about a week. we got back together, and we are very happy together. but now, since we are so happy, im begining to feel like really guilty, like i dont deserve him. i cant explain the cheating thing, it is to long. but it was peerpressure and kind of forceful? i dont know, i always feel like people are talking about me, or it. it keeps being brought up everytime i am around someone. i always feel guilty and like there is no one to help me.... my mom just tells me to forget about it (she knows everything about it pretty much) and, i just i dont know, pretty much on the verge of, giving up, killing myself. i live in a small town, everyone knows everything.,