I’m mid-50’s so, perhaps, I don’t understand the nuances here. I can’t see a reason why you feel you can’t block this person from your tumblr but it’s ok/appropriate to ask others to block him from theirs. Is he going to complain to your family? So what? Do you not believe your family would be supportive? Simply put, he’s developed an obsession where he’s ignoring your sexual orientation, inventing a fantasy where he can alter himself and you so that you end up in a relationship with him. He’s stalking you but that’s not enough for you to report harassment via the tumblr reporting system? FFS! He used a filter on one of your pictures, without your consent, to sexualize you. He literally cornered you alone, forced you to come out but he’s STILL pursuing you by dismissing your orientation as “childhood trauma”. I don’t want to be harsh but I’m going to be because I’m not sure you will hear anything else. YOU have a responsibility to protect yourself. Don’t push it off to others with feeble excuses for why you aren’t willing to block and report him. Tell your family what is going on, how can they help protect you if they don’t know? You’re almost at a point where you could file a police report for harassment, are you going to hold your silence and wait for him to actually assault you before you, personally, take preventative measures? Tumblr may end up not being your safe space, frankly, it doesn’t seem like a safe place for you now. Maybe he’ll escalate, embroil others in the turmoil… again, so what? Are you honestly willing to jeopardize your mental, emotional and (potentially) physical health on not rocking the boat? Yes, get your mutuals to block him too. Shut him down on every single possible point of access, block him on your phone, emails, social media… EVERYTHING. If he tries to escalate, make it clear you will take legal action. And, yes, as has been said by others, make sure you are never alone with him.

Please document what has been happening, both online and in real life. Consult the police or a lawyer on what you can and can't do (keep in mind that cops vary and some may be dismissive, others more sympathetic). Better to have a solid case if you ever need a restraining order.

I really hope it will not be the case but you are not in physical danger... until you are. I am not sure how tumblr works but in real life you should begin to search other solution. Never be with him alone, cut any ties if necesary. I truly hope I am wrong about this.

You are ALREADY in danger! Think about what he could have done to you. Everything he does is harassment. Stop protecting him and let him reap what he sowed! I really don't care if he has no self preservation instinct Block this creep everywhere on the Internet and move away from him IRL as soon as you can! Yeaah I know you said you couldn't . NTA at all., HE IS THE A*****E ALL THE WAY! Sorry for screaming but I'm really worried about your safety. Since you mentioned in your bio you are French, I assume you live in France , Jesha &JB already said almost everything but it is never harmful to repeat document every occurrence of this creep's behaviour, ask for a restraining order NOW (injonction d'éloignement), I think you have more than enough to file a complaint for harassment. I really don't like the police but this is a case I do think they NEED to be involved in. Please take care of yourself and keep us updated.

He blocked you on a forest road at night...but you don't feel in any danger? I mean, nobody expects the people they think they know to hurt them but 9x out of 10 it is someone known to a victim that commits the worst crimes. I don't want to scare you but I would tread carefully, NTA for wanting to block him but your fear this could trigger something also makes sense. Keep your friends close and your enemies closer is the adage. You need to be watchful and aware and make any escalation well known to the family to get real help dealing with him.

You really skipped over the "I cant block him for several reasons" like its irrelevant. Its totally relevant.

Why would you be the one in the wrong here? He is obviously stalking you, protect yourself however you need/want to.

Why can't OP block him? That seems like the most obvious solution to the tumblr part of the problem.

Ma'am remove this person from your life, right now and with extreme prejudice, block and go no contact immediately. Please be careful, stay safe and trust your gut 🙏🏻❤️ 👍🏻