Oh, this may be why! I don't know what is bothering him and I'm scared to ask, could you give me some advice please?
In general, we should not do what we do not want to be done to us. But it can happen that we do something that we don't like without paying attention to it. In the context of a relationship, we can try before each action to ask ourselves whether or not we would be disturbed if our partner would do this action.
There are also personal preferences, such a person may not be bothered by such a thing and be bothered by another that you are not bothered by, but this is learned through communication.
If it doesn't work or requires you to make too much effort, it probably means that you don't have the same vision of love.
, I'm always messing up, please tell me what to do
With a few exceptions, people don't like people who repeat themselves too much and don't move on; we can say things without repeating them almost every day.
Likewise, people don't like to stay around people who are always sad, this is also why many hide their feelings, at first people offer comfort but if that doesn't change anything, they get tired and leave. It's quite common.
Some people who know that another person is planning to kill themselves, prefer to move away to avoid suffering emotionally, it's self-centered but common.
he recently said meeting me was a mistake
Either he said it out of anger and didn't really mean it, or he's putting himself before you, which is not what a partner is supposed to do.
I'm scared he will leave me at some point
I can't say for certain, it could be that his behavior comes from elsewhere, but I have the impression that you don't have the same vision of love, and in this case you don't I can't do anything about it and it won't end.
You're already putting in a lot of effort, not many people would take that much trouble.
If the situation doesn't improve then it's probably better to prepare yourself psychologically for your relationship to fall apart and not worry anymore. First love is often the hardest, but sometimes it's also the worst.
It's difficult for us to judge objectively.
It would probably be ideal for you two to have a full and honest discussion about your current relationship. Maybe you are, or he is afraid to speak frankly.