If he is a shy nerdy guy, then is this a bad sign or normal?

If i was in that situation i would just be honest with him...send him a text asking why he isnt talking to you and just ask him if hes dating her or has she found out or summin...also be a bit harsh cus its not fair on you. he should atleast tell you why he isnt talking to you... so just be honest cus ur not going to get anywhere if you dont :)