I need advice girls. I dont know what to do

I've been in love with a girl for over a year now, when I fell in love with her, we were together all the time, and everything went the right way. but after a while we lost contact. I tried to get in touch with her, but it did not succeed. After many months, I ended up being best friends with her ​​brother, who always gets mad when I talk about her, or hints that I like her. Then suddenly, after about eight months without talking together anymore, I meet her at the party. at the party, she is very happy to see me, and I her. we are making out at the party, and we had a great time together. after the party she called and texted me many times, and wants us to go on a date together. The problem now is that I am best friends her big brother, and does not want to lose him as a friend. but i love this girl, what should I do?

You need to ask her if she is serious about getting back with you. If she is not then keep your friendship, and if she is try to talk to her brother about it, if he is a good friend of
yours he should understand.