I am a female, and i am 18yrs old. i started masturbating since it helps me instead of self harming. but i would like to know how to feel while i masturbate? i mean since i stopped having that good feeling?

Hard to say: First I am glad you are not hurting yourself anymore. Emotions can be strong and confusing at times. Masturbation can have some positive effects but as with any activity if your mood worsens or you spend too much time in this activity you may consider visiting with a therapist. http://www.webmd.com/women/features/female-masturbation-5-things-know