MasileinDE wrote:
You kinda realise it by being honest with yourself.
There's only few behavioural systems that people adopt that are harmful and people don't actually realise it.
Believe me, you know if something is bad for you or might jeopardize your health / future. You might just ignore it as good as you can.
To really be sure, I'd say talk about your worries with people who care about you, won't judge too much and are able to give additional outsider insight into your life.
I'm giving an example here, but I have friends who check up on me when I don't interact with them as much as I usually do just to see if I'm in a dark place or if I need space. I forget to tell people if I need space and just isolate myself, because telling people isn't a priority for me. So them checking in reminds me: Hey, why did you isolate, what's the matter?
I also share responsibilities with friends. I'm talking with them how I'm doing and if something worries me. For instance, two months ago I completely lost my appetite and it got so bad, that I actually occasionally forgot food was a thing and had two instances of nearly fainting from lack of energy. So I talked with my friends about these weird symptoms and said, that I'd check with my doctor if things didn't get better within the next week. They then asked the following week how I was doing and if I already made my appointment. We kind of hold each other accountable for these things - I do the same for them.
It also helps to evaluate the reasons for your behaviour and really analyse whether they actually make you feel good or only just make yu feel different. It also helps you focus on your proirities. Are you a now person, so someone who just cares about how they are doing temporarily, or are you a future person, so someone who cares more about the outcome and how things will evolve. Bein conscious about these matters helps see how you really feel about current patterns of behaviour.
The fact that you make a thread and ask already shows you know that there is some potential harm to be found. You are aware of how things can go badly. You now have to find the energy and motivation after deciding what you really want (not what is easy or what is comfortable, but what you think is best for you, no matter what it is), to actually pursue that. And if you feel that you're missing systems and fallbacks in your life to assure you being able to reach certain steps, do talk to your physician and ask about possibilities. If you have a doctor who cares a little, they'll absolutely be able to refer you to some helplines and the like. You still have to do the work and can't expect the change to come to you some day, but you can get help in finding people to support you that way.