There is no concrete evidence of Eren actually showing romantic feelings towards Historia and vice versa. It seems to be an exaggeration of their great respect and admiration for each other. Again, Eren can marry Historia eventually if the baby is actually his, but it's unlikely to be out of love.
It's one out of two of Historia's canon ships, the other one being YumiHisu, where Historia and Ymir were lovers until Ymir's death. Although FarmHisu isn't a very popular ship among the fandom, it seems to have a lot of potential. It is unknown when exactly Historia married the farmer and the name of their child.
Eren is the last person Historia is going to marry. That is because she is homosexual. And she's in love with Ymir and they had already planned to get married at one point. From Eren's side, Mikasa is the one destined to get married to him.
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7 Sanji Awakened It While Training On Momoiro Island By the time he arrived at Sabaody Archipelago, Sanji was a great user of both Observation and Armament Haki.
8 Sanji Possesses Two Haki Types, Observation & Armament During the timeskip, Sanji was able to tap into this power, and he specializes in the usage of Observation Haki. Sanji is strong enough to hurt Queen, one of three right-hand men of Kaido with his kick, which was likely coated in Haki.