Relationship Problems Pt2

I am trying to feel more comfortable in my relationship with this girl I've been dating for 8 months now. She has cheated on me twice and each time was for something difficult. The first time she kept it hidden for a week and it was because she wanted to feel loved more and thought I couldn't do that. After she did that I asked after a days if she still had feelings for me, she said yes and broke up with the guy. We got back together but after like a month (like 5 days ago) she cheated on me after she agreed to date someone after that person said they had a crush on them. She almost immediately told me we should be friends because "things are crazy rn". We talked about it and she said she still loved me, and wanted to get back together. At the end of the night I said agreed.

Throughout our relationship she told me she's scared of men and what they'd do to her if she said "no", so I'm trying to be more understanding. She also has attention deficit disorder and is medically diagnosed with autism. So whenever she doesn't talk to me for a long time I don't think she's talking to someone else, but sometimes I do think she is because it's already happened twice and I can't help but overthink.

I don't want to breakup but I don't want to keep feeling hurt in our relationship. Is there anything I can do that will make me more comfortable and less stressed?