I used to like a guy in eigth grade my friend told him and he reciprocated but till then I had moved on, he ursuaded me for 3 years but I rejected him badly again and again, but I started liking him again but since I was shy I could not tell him he used to still like me, school ended but I still could not tell him, for the past one year I had felt pangs of regret always, but I felt better after sometime , now he wished me on my bday and now I am again feeling the same pangs of regret and turmoil I feel I am stuck in that situation again, I really can't tell him that I like him, but I feel really guilty sometimes, I can't concentrate on studies also, please help