That is essentially what Machtan states, that from early 1930's until 1945, Hitler was sexually inactive.
Only Eva and AH can really answer that question. Since Hitler was prepared to send Eva off to southern Germany in those final days in the Bunker, and she refused to leave his side and they got married at the very end, I think there was certainly a deep attachment. Eva lasted the longest of Hitler’s mistresses because she gave him what he wanted and did not interfere with public policy or the war effort. She kept a low profile which is exactly what Hitler wanted as he wanted to appeal to German women.