Working with one .tf file which include creation of s3 bucket,ec2 and security group, my concern is that if i ran terraform apply and it successfully created s3 bucket after that abort in between . In above case i wanted to rollback the all changes happened after terraform apply ran.

Once .tf file started running ,i had abort the process but changes won't rollback.

provider "aws" { }
resource "aws_instance" "example" {
    ami  = "ami-2757f631"
    instance_type = "t2.micro"
}
resource "aws_s3_bucket" "b" {
    bucket = "my-tf-test-bucket"
    acl = "private"
    tags = {
        Name = "My bucket"
        Environment = "Dev"
    }
}
resource "aws_security_group" "allow_rdp" {
    name = "allow_rdp"
    description = "Allow rdp traffic"
    ingress {
    from_port = 3389 #  By default, the windows server listens on TCP port 3389 for RDP
    to_port = 3389
    protocol = "tcp" 
}
}