I have doubts about my current relationship and idk what to do...

I'm currently dating a girl, she's amazing and I love her so much, but lately conflicts and various things have arisen and I honestly don't know how to feel about it or what to do.

We have been dating for 3 months, I know a little ridiculous, having so little time and having these internal conflicts....I met her in an online game, since she saw me, she never took off me and told me things like, call me "the love of your life" lol, It was funny, but after a month of her treating me like that, I started to like her and she proposed to me, I hesitated, it seemed very sudden, I even asked a friend, but in the end I accepted. It was cute, everything was cute, but recently she started doing dramas and starting mini fights in front of our friends in the game, it was awkward, but I didn't want to make things worse so I just didn't say anything and laughed, but then one day I didn't say good morning to her, I didn't think it was going to be a big deal, but she got upset and behaved curtly with me or when I asked her if she would play with me she said no and played without me, I didn't think about it much, but when I saw her WhatsApp statuses, she posted too many old photos of her, including 2, one of her without clothes, just her underwear, posing in front of the mirror and another of her private part, only with her underwear and her friend's hand touching her there, I was confused, but I didn't mean anything, nor did I mean to think badly, I don't want to be someone toxic or jealous, so I didn't say anything but I was confused but then she told me that she was sorry, that she was acting like that because she was upset and that it wasn't to make me feel bad, I told her that it is fine, that I understood but I was confused and I was a little sad, I wanted to talk to someone but I didn't know who....

The next day she acted the same again and this time I decided to ask her if she was okay, she told me that yes it was normal that she just wanted a change, honestly I was still confused and the next day, I decided that it would remain the same then I no longer invited her to play and I played without her, but she got upset and asked me what my problem was, I explained what I thought and that I did not understand her, she didn't answer, she just said ok well, and left, I thought it was rude, so I talked to her to get at least a decent response but she started telling me not to make drama about something so insignificant, that she was normal, I was bothered by her attitude and I tried to let her know, that it bothered me, but she kept acting like that, until the next day, she apologized and we were finally able to finish the topic well. But now we were playing normal in another online game, and well in this game she usually makes me some emotes with mine characters, huh... well you know lol, but suddenly I see that she followed another player, she made the same emotes and this player responded with suggestive emojis, shortly after I see that she follows him again and they do the same so I got out... I jokingly told her that she was unfaithful to me, i was joking but i was also uncomfortable but I didn't want to sound annoyed or jealous just for a game...i didnt want to seems a idiot, tut then she replied that it wasn't a big deal, that she was just annoying people...haha honestly i stee without to know what to do or think about it or with who talk about it... haha too much text sorry.