MC has half of the old God's powers while the ML has the rest. That's why he could only eat himself or the ML as a way to replenish energy.
They did roll in the sheets after the first meeting but no feeling were involved from MC. After getting together for multiple worlds does feelings develop but MC doesn't admit it to the system or himself till later.
I believe he was attracted to the other half of the God power.
A school yard love story suddenly becoming a zombie apocalypse.