Girlfriend pulls away every time she is under stress?

Anonymous
Every time my girlfriend is feeling stressful she'd pull away from me. Like acting distant and cold towards me. Recently she has been less affectionate with me be it verbally or physically. I don't know what to do. She is busy with school work and stuff so I guess she must have been stressed out or something.

Should I leave her alone and don't bother her until she becomes normal again?
Girlfriend pulls away every time she is under stress?
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