I'm struggling with stress and friendship setting boundaries and such. Idk where to start.

Ultimately, regardless of the problem we are facing, the answer is always to look at our situation to see where we are with it and what we have at our disposal both internally and externally to deal with it. Whenever you feel lost, whether it be physically, mentally, emotionally or spiritually; it is nearly always in your best interest to sit down and get a sense of where you are - because that's where you have to start. The exception to that statement would be if you are in a physically dangerous situation to where you have to keep moving just to stay alive, but otherwise the best course of action for you and others around you is to focus on doing what you can do on your own before you start involving others as well.

Dealing with stress in and outside of relationships can be overwhelming at times, but I believe it to be beneficial for us to reflect on what our situation or relationship would look like if we decided not to deal with it by allowing it continue to play out. Typically health challenges will not improve over the long-term unless we decide to take action, and social, mental, and emotional problems aren't any different. My encouragement to you is to visualize the future you want to have where both you and the other person in the friendship/relationship are able to be open and authentic with each other, and then start doing what you can from your end to invite them to meet you in the middle. If they start moving your direction in ways that feel good to both of you, then you just need to keep up the good work. Should they not move towards you, then you have to decide if the relationship is going to be worth it to continue, because some people will not respect your boundaries - which means it's even more important that you maintain the personal boundaries that bring you peace and happiness in your life. 

Start working your way towards that relationship today by making little consistent efforts to improve yourself in the areas you want to experience growth. Just like we can't eat all the food we need in a week just in a single meal, the growth you want to see will start from you doing the "little things" on a daily basis that will make your vision become a reality. Talk to family members and/or other sincerely interested people in your life, and if they are supportive of you and your vision for the future, it may be helpful for them to provide an additional layer of accountability for you by sharing some of the goals you have for yourself and having them help you in your efforts to track your progress. You will find yourself becoming more and more happy each day that you're giving your best effort and you have a healthy balance with asking others for help to do more on your own.