honestly i can relate to this so hard, but at least you are lucky enough to be able to have the opportunity to at least get away for a little while to get some fresh air and a break.
first, weigh out the pros and cons. you are finally feeling happy, which is super important, but you may also eventually have these really sad cloud of thoughts about your parents and the bad relationship constantly lingering in the back of your head. if you're worried about not having a phone, you can get another one somehow so that shouldn't be the biggest problem.
you know your parents best, and if you think that you wont get along with them even after they tell you things will be better, you should trust your gut a bit. how are the phone calls with your mom going? is there any negativity in them?
as i mentioned, if you finally feel happy for once, you should listen to that. but tbh i also think that you should try to fix things with your parents because when you and your parents have a stable relationship, you will ultimately be really happy too and you wont have the constant cloud of the bad relationship with your parents lingering around if you dont fix anything.
trust me, i honestly get how you feel and this probably might not be the answer you wanna hear, but depending on how bad your relationship with them is and if you have gave them chances to fix the relationship in the past, you might wanna try fixing things. im not saying to permanently go back though, try to slowly work this out as you are taking a break at your grandparents house.
also you can ask your grandparents to try and talk to your parents, this may help a lot.
the most important question to all of this is; do YOU want to fix things? you have to remember that if you feel like you would be far better off without dealing with all of this, then listen to your gut.
as for the summer, i think its fair to maybe visit your parents over the summer to just feel it out before you make a firm decision. idk if you have that choice or not, but maybe try to to first continue to call your parents on the phone and see how that goes, and then work your way to visiting them. when you visit them, see how they act and if you feel like the relationship with them has the potential to improve.
if it does have the potential to improve, stay there a bit longer. if it works out and the relationship is improving, then stay with them. but if it doesn't improve, you should probably leave it then because theres no point in trying to fix it at that point.
you have to remember that if you try to fix the relationship, you gotta make sure you put your all into it. 105% effort is needed from both sides to fix something thats broken, but it can be done if both you and your parents make the effort to meet each other halfway.
have a long talk with your parents and honestly just tell them how you truly feel. if you are willing to fix things, tell them that. but also tell them that you arent coming back just for some temporary fix that will go back to bad later. you are in it to fix it for the long run.
with whatever you choose to do, follow your heart love. trust yourself and know whats good for you. this is a really hard situation and im so sorry that you have to go through this, you deserve the best. everything will work out in the end, and youll find your way. i really hope this helped bc im honestly like the worst at advice haha. but anyways, good luck <3
