He couldn't have gotten control of your finances without your consent so that "somehow" seems kind of misleading. if you're honest the somehow means he somehow convinced you to give him the control so please be honest here, he had no way ot taking your checks without somehow you giving in to an agreement where you surrender your check. So that out of the way, you've gotten yourself into a situation where it's much less like your brother helping or even taking care of you and more like a situation where he's in control. While initially I might think he had your best interests in mind there is no evidence that he is "helping" you other than controlling your finances. There is no evidence here of what he is doing with your finances to assist you in getting out on your own, finding your own place and being independent of him again. He's merely using your finances (as it seems anyway) to supplement his and doling out what he feels like you deserve of your own money. Sorry that's not assistance, that's control and dominance. Even stretching this to assume he really has good intentions, all that is blown out of the water with his interactions with you.

You're siblings and adults at that. Would you wrestle with a guy, 26 yrs old that is just a friend like that? You say that you used to do that as kids but that is irrelevant because you are no longer kids at all. Most ladies I know would not be wrestling around with another adult male of their age or older because of the intimate contact it involves which is in most cases other than romantically involved pairs. Sticking his thumb in your mouth? Grabbing your face? I'm sorry but this screams of just WRONG all over the place.

You need to get away from your brother, he's not acting like one and he is definitely not doing what he is doing to help you.