It's a trick to make us wait for the phase where things will start falling in place.
The MU's written for Suman are weird but not impossible. Many times in our life, what we see directly through the naked eye and from a distance, isn't true. We falter, and that's fine for her I guess.
Baki, she wants to Show Off using Vikram, but most probably she isn't even realizing this thing. She still is doing everything because of Shravan. The moment she will realize this thing, we will see Shravan drifted on the other side, with probably with some other girl.
Honestly, I can understand softy Shravan, that is too not impossible.
How-
1. He won the case.
2. Suman lost, plus it was a tedious journey. It had cost a lot of mental pressure and even a small celebration like the dhol wala can at least upset Suman ( don't expect her to smile and be like it's good, because for her it isn't. Plus she was just beginning to reflect over her MU's, and the whole scenario was put up in a bad light.)
3. His parents are alive, most probably are going well in their married life. His father has gained his victory in the case, and Shravan instantly could revive all the memories of Colonel Vijay Tiwari- who was his teacher and he genuinely loved his uncle.
So yeah, he just wanted to tell Suman that 'Hey! I didn't do it on purpose."
If Suman was in Shravan's place, then the same could have happened.
I don't think their was anything over in this case. Rather we should be happy that Suman behaved with maturity in the cantonment.
And, if she is hurt- then, of course, she wants to party hard and let Shravan see that she isn't some cry baby. Using Vikram is wrong, but then she doesn't realize I guess.
Shravan is modest, genuine, and of course, winning the case had a positive impact on him. He has got better friends, good people around and that affects how you go about.
The most important difference is that Suman hides a lot. Shravan, on the other side, tells everything to his friends- who take it in a good light.
I have always found Shravan around people who can understand him and his inner emotions.
For Suman Shravan was that guy. And now, he isn't there. So I guess, let's be easy on her!