AIBU to want out after being love bombed so quickly

This person is a narcissist and you need to make sure you make this split permanent. Absolutely get help from womens aid or Suzy Lamplugh trust.
Block him off everything, don't answer any unknown numbers. Tell your friends etc, and screenshot or record any attempts to contact you. If you don't have a ring doorbell, get one.

Via text or phone. Not face tk face.
Before you so contact Women's Aid for advice.
Inform friends and parents that you will be doing it on X date abd have then block his number.
Make sure you have a ring doorbell fully charged at all times.
Make sure your mobile is fully charged at all times.
Log with the police every single time he makes contact with you or your relatives. Logging it as it happens shows the pattern of behaviours, which is really important.
When you text, do not give a reason, keep it a statement. My feelings have changed abd I no longer think we are compatible. Then block and move on. Giving any reason at all juat gives them information to try and convince you otherwise. Short, blunt, block. Give them no room for manoeuvre.
Have a code word with friends abd family in case, something random that they know means trouble with him and to get help.
Wishing you luck. You can do this.

I agree with others you kight want to check in with women's aid or similar. But this is the sort of approach I would take.

Thats not love bombing that's stalking.

“I don’t feel we are compatible and my feelings aren’t going to change. I need you to respect my feelings and I want you to stop contacting me.”

'Dear loser,
welcome to Dumpville.
Population - you.'

This’ll do nicely, on repeat.
ETA Then escalate per PPs.

All of this. Document everything.

You need to send him a message that is very clear and cold, saying something like 'Our relationship is over. I do not want to hear from you again, and you are not to contact my parents or anyone else close to me either. If you ever contact me, or try to reach me through other people, I will consider that harassment and I will report you to the police.'

Then, if he ignores your wishes and continues to contact you, you need to speak to the police and explain what's happening.

You also need to make a note / take screenshots of every attempt he makes to contact you and what he says. Do not reply to him when he messages you.

This isn't 'love bombing'. It's stalking and harassment.

If he is stalking you then call the police. But you need to make it clear in no uncertain terms the relationship is over and you want no more contact of any form. Don't give mixed signals.

I think I'd contact services like Womens aid or whatever is available in your area for support. They can help with a safety plan. There's something called Claire's Law where you can request info to see if they've been convicted of a Domestic Abuse offence etc. But Womens Aid can talk you through all that. Wishing you all the best.

No wonder you're so concerned. This could be seen as stalking.

Firstly, this is not your fault!

Take a look here for some help:

https://www.suzylamplugh.org/pages/category/national-stalking-helpline

Over the phone, in that case. Get his stuff out of your home and get a friend to drop it all off. Change your locks, vary your routine. Change your passwords and up your security settings. Do not hesitate to involve the police.

Contact Women's Aid. This is what they do; they will absolutely help you.

https://womensaid.org.uk/information-support/the-survivors-handbook/i-want-to-leave-my-relationship-safely/

Then you need to contact women's aid for advice and also call the police when he shows up at your door. Your parents need to make sure they block his number so he is not able to contact them and not pick up the call from unknown numbers.

I mean this is more than love bombing really, isn’t it OP? More like harassment.

Nobody can really help you until you provide some more information.

How long have you been dating this person?

Have they been controlling/coercive/abusive?

Can you explain why you fear for your safety?

Can you give some examples of their responses when you've previously told them to ease off?

Have you tried to end the relationship at all?

This must feel really frightening. Have you got someone you trust to talk to in real life about this?

It may be worth getting advice and support in navigating the break up.

I wouldn’t tell them that you’ve realised they love bombing you, partly because they’ll adjust their behaviour for the next date and she won’t see it coming, but also because I think the sort of people who lovebomb are manipulative and you’d be giving them a basis for negotiation.

Saying that the relationship is making you unhappy and you don’t reciprocate their feelings isn’t something that they can argue with or promise to change. Don’t go into any lengthy explanation. Don’t promise a friendship. Just say that you’re not willing to fake something you don’t feel and that’s all there is to it.

Can you explain why?

“It was really nice to meet you, but I don’t think we’re compatible and you’re not what I am looking for. I wish you all the best and hope you find your person”

Then block

Are you concerned for your safety if you end the relationship?