I’m 18 (F), and I come from a catholic family. 
We had a loss in the family a few months back that I was heavily involved in, I’ve been struggling with grief and haven’t been myself for months. 

I don’t talk to my parents about how I’m handling it because I don’t feel they would fully understand how it’s affecting me. But around the same time I reached out to a close friend and he and a couple other friends have really been my crutch to get through this. One of these friends and I have recently gotten into a relationship and I’ve really bonded with him. He means a lot to me and he’s constantly worrying about how I am. 

Well yesterday I came home, and I had some faint hickeys along my neck. Nothing too obvious but still there. My mom flipped and went off on me about how I claim to believe in God but then do things that are inappropriate. She asked if I was sexually active (which I am not) and how I can claim to be chaste when I’m with my boyfriend. She eventually said I was not allowed to visit his house and if he wanted to see me he would have to come to my house, because I obviously can’t control myself around him.

I’ve really been struggling with loneliness, my appetite and grief and I feel that if I let my mom control my relationship like this I could fall into a deep depression. These boys mean everything to me and while I don’t want to hurt my mom, I feel like she is going too far. I know she worries and she herself is struggling, but this doesn’t excuse her behavior. 
AITA for putting myself first? WIBTA for ignoring her and doing what I feel is right for me?