[20F] I have deep inner sadness, and I can't date other men as a result.

I talked to my therapist about it, and she told me that it simply takes time to move on from a break up, and that this sadness is part of the process. My mom encourages me to go out with new men, because she thinks it's a way for me to move on (rebound?), even though I'm not fully healed yet (I'm better though). After going on 1 date with a random guy, I started going out with this one guy, who I've known for a while, but we just recently became friends. He's so nice and cute, but I feel such emptiness... No butterflies no nothing. Pure emptiness. I feel mostly insecure about myself. I don't feel deserving of his love because I feel like I've been looking so horrible lately. After the breakup I cut my hair really short because I panicked, and even though it's been almost 6 months, it still hasn't grown to the length that I want. I'm not happy, I want to cry every time I'm alone. My friends are very supportive but I feel like it's not fair to talk about a guy when we only went on 2 dates. I don't want it to turn into a situationship, and I guess I do want to give him a chance. But my inner sadness prevents me from feeling anything. I used to look at my ex when we started dating and blush. Where is that blush? Where is the exitment? I'm so done. I don't even understand myself.