Geet is on the terrace.
Since ML and especially when they were separated by the circus the terrace has sort of become Maaneet's spot, where they meet, comfort and spend time with each other. However, when the stalker told her to come onto the terrace and left her gift there he violated the space that was exclusively for Maan and Geet. Hence Geet now connects the terrace with the stalker's invasion in her life.
Geet is swinging
I looked this up on an online dream dictionary and here's the explanation I thought fit best.
To dream that you are on a swing suggests that you are experiencing great satisfaction and freedom in your waking life. It also symbolizes cycles and movement.
So here is Geet, happy in her life with Maan, "experiencing great satisfaction and freedom". We could also link the cycles and movement to Maan falling in love with her after his ML. Finallly after a long wait, there is some movement in their relatioship and it has come a full circle again. They are also now ready to move forward with their own lives and create new memories as Maan has been promising.
Enter the stalker
Geet's peaceful and even swinging, representing her life with Maan is interrupted by the stalker's footsteps. Here he is once again invading Maan and her space, trying to take Maan's place in their spot, with Geet. She stops swinging, ie her life comes to a standstill due to his entry. No more movement.
Geet runs from his voice but into his arms
Then we see something very accurate to dreams, which is the distortion of space and direction. She is running away from the source of the stalker's voice but in turn runs straight into his arms. It is as though she ran a circle (I have done that in dreams before) and the more she runs away from the stalker the closer she comes to him unknowingly.
This part of the dream, I think may be prophetic to Vikram entering their lives, in physical form as someone who Geet will go to, not realising that he is the same person she is running away from. He will not reveal his physical form with his voice (which represents his secret identity as her stalker) and he will not reveal his voice with his physical form. In the dream Geet mistook him for Maan, where I think Maan represents a safe place, someone who will protect her and save her from what is chasing her. In real life too she may confide in Vikram about the stalker, thinking he will help keep her safe. She may even see him as an extension of Maan if the guy befriends Maaneet in disguise as a business associate. Then Vikram won't reveal his voice (his identity as the stalker) until Geet has run into his arms and he has her held tightly there. So basically, by the time Geet realises who he is, ie not someone safe but in fact the stalker, he would have trapped her.
However the bright side is that even though he was trying to hold her tight, she shoved him away and shouted for Maan. So hopefully in real life also she won't hesitate even if he has her backed into a corner, to push him away and unabashedly call out to Maan.
Another way to look at it is that Geet can't avoid confronting this man. No matter how much she runs he will end up in front of her, possibly disguised as somebody she can trust. So she has to confront him and his crazy feelings and bodily push him away before she can wake up from this nightmare and find Maan. It could also symbolise the fact that banishing the stalker is something she has to do herself, without Maan's help.
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