User blog comment:B214/Season 3 discussion/@comment-178.128.187.173-20150913203258/@comment-213.120.234.138-20151001112816

Both Xeroz and HyodoIse are correct. And its portrayed waaaaaay better in the LN then season 3 which quite honestly soiled a lot of the good bits of the LN. The LN's portrayal of Issei's pain makes it more human and easy to understand a sympathise with. When you have your heart completely shattered like Raynare did to him you'll do anything to stop it happening again. It's only natural, which is why until Volume 10 Issei figuratively kept Rias and the girls at arms length. Deep inside he knew they weren't like Raynare, especially so with Rias but it's hard to think rationally about something irrational like love, especially when all your experiences in it have been bad.