I can offer some general insights that might help you understand the situation better.
It's possible that your therapist didn't shake your hand today because you mentioned having a cold last weekend. If your therapist is being cautious about germs or illnesses, it would be understandable for him to refrain from handshaking to avoid any potential spread of infection. In many professional settings, including therapy sessions, it's common for people to avoid physical contact if there's a possibility of transmitting an illness.
Try not to feel awful about it. Your therapist's decision not to shake your hand likely comes from a place of concern for both your well-being and his own health, as well as the health of other clients. It doesn't mean he has changed his attitude toward you or anything personal.
If you feel comfortable, you could discuss it openly with your therapist during your next session. This would give you a chance to address any concerns you may have and understand his reasoning behind the action. Communication is key in any therapeutic relationship, and expressing your feelings and seeking clarification can help build a stronger bond between you and your therapist.
Remember, therapists are professionals who prioritize their clients' well-being and safety, and they take appropriate measures to ensure a safe therapeutic environment. If you have any doubts or questions, it's always okay to talk about them openly with your therapist.