How to get over a 4 months relationship that felt perfect but ended so fast ? [22M] [22F]

In short, I started a relationship with a girl but we never made it official since she want to at her own pace because of past toxic relationships. I respected that. The whole relationship was perfect, she respected me and I respected her. We'd see each other almost 2-3 times a week. She'd come sleep at my house. We did have intercourse like 2 times and lots of foreplay. In short we were acting just like a couple. But near the 4 months mark, she had surgery for her jaw and we stopped being able to see each other. She lived in an apartment and letting people in it is really hard for her and always preferred to go at people's home instead (It was the same for her friends too. It's simply hard for her). Also was still living with her ex but she told me during the whole relationship that they were done for months. Anyway following the surgery we couldn't call or video call since her made her unable to talk. We did text tho but there were delays since she was using lots of meds making her sleep a ton. So yeah like 2 weeks after her surgery, she was talking a bit and was also video calling her bestfriend. So I proposed to her that I could come pick her up and we could go to my home to watch a movie or just pass time together. But she explains that when she is not doing well, she needs complete space and prefers to be alone. (but she talks with her friends tho ? And her ex is still around since he's her roommate). She says that this is not something she want to change about herself. When people try to get closer or insist on being there for her, she feels that her needs are not respected and instinctively distances herself because she lacks the energy to deal with others while struggling to take care of herself. She says she is currently in a very difficult mental and medical perdio and does not feel stable enough to let a new person into her daily life, which she describes as chaotic and full of contradictions. She believes the situation isn't right for me since she thinks that I need closeness, reassurance, and consistency which are things she feels incapable of meeting. She stresses that she cannot meet even her own basic needs right now, refuses help from others, and feels pressured and stressed by the idea of being unable to satisfy someone else emotionally. She doesn't wat to me hope or make me wait without knowing when things might improve. She also feels uncomfortable knowing that I may be overthinking, worrying, or holding back my feelings because of her distance. (all of this is based on what she literally told me)

She then tells me I'm important for her and she considers me and would like to keep snapping with me but would understand if I didn't want to. What's annoying me aren't the reasons since I feel they're right. It's the fact that 3 weeks later, I see some pretty good proof her ex(/roomate) was with her for christmas. She said not being able to fullfill anyone needs but she's able to go back with him ? Even though she knows he was toxic with her (invasive, manipulator and simply too much) ? She told me lots of time she hated him and all. I also have some signs that she might be already seeing someone else/her ex. We were "dating" for 4 months. I know it's been almost 3 months since she dumped me but within all of those texts she never said anything about not loving me so I wonder if her reasons were right and if so. She already with her ex or even courting someone new ? I feel kinda lost, obsessed over the whole situation and having a hard time getting over it. What do y'all think ?