I suspect he's been using the subtle techniques for a long while before this, and that you're likely only noticing because the form of abuse is shifting.
Can you tell us if hes ever done any of these?
Humiliated or embarrassed you? Probably portrayed as a joke. Then criticized you for being "soft/wimp/easy to wind up".
Constant put-downs,
Hypercriticism, making you think that everything you do is wrong, can be as simple as raised eyebrows with an intake of breath, or "Really?" Or as open as disagreeing with everything you say, "Yeah but..."
Refusing to communicate, maybe noticeably being in a strop but when you ask what's up he says "nothing!" Maybe even comments that you're nagging at him, or makes a little snide comment "you're the problem but youre never gonna change so why bother trying" and walking off.
.Ignoring or excluding you. Similar to the above. Ignoring you for long periods of time or choosing not to talk to you at all
Extramarital affairs, texting other women, being over friendly or flirtatious to other in front of you.
Use of sarcasm and unpleasant tone of voice.
Unreasonable jealousy.
Extreme moodiness. Goes into strops and you feel like you're walking on egg shells.
Mean jokes or constantly making fun of you. This can be around others.
Saying “I love you but…”
Saying things like “If you don’t , I will.” this can be more subtle "well thats fine but it means..."
Domination and control, not always easy to spot.
Withdrawal of affection. Shrugging you off a lot, and appearing cold. This might mean you're waiting for him to "thaw out" a lot and waiting for him to come to you for affection
Guilt trips. Making everything your fault.
Isolating you from friends and family this could be refusing to take you somewhere or making you late/stressed about going out.Using money to control.
Constant calling or texting when you are not with him/her.Threatening to commit suicide if you leave.
Are you both named on the house? Tenancy?