Welcome to the forum! 
This is not someone one of us can wave wand over and just fix, but we’re happy you’re here and we can help you learn the magick we use to start developing your life and yourself into what you want. I thin you’ll want to do a few workings starting to cleaning up your energy system to get rid of bad energy and stop more being attracted to you.
For the harassing “friend”, I recommend you do a binding to stop him thinking about you or contacting you, alternatively the Force Exile working from the book 'Angels of Wrath" gets good results and neither need any prior learning or skills.
- Bindings - pick one you like or finding something else online: Unofficial Forum Tutorials: Bindings and Stealth, Freeze Spell, Glamours and Invisibility
- Angels of Wrath on Amazon. Book thred here: Results from the book 'Angels of Wrath'? by Gordon Winterfield
Please do let us have your Introduction HERE [ ← click me! ], which we need per the forum rules and see our posting guidelines in the FAQ.
Points to cover:
- Where are you from?
- Do you have any practical experience in magick?
- If so, what exactly do you practice and
- How long have you practiced?
- What are your areas of interest?
The getting started guide with all forum orientation stuff, links to tutorials and popular megathreads are here: GETTING STARTED GUIDE, Rules, Notables, Tutorials and References. The links in that megathread are forum-made tutorials for things like spiritual hygiene, developing your astral senses and avoiding impostors and parasites… When you can be sure you’ll not get attacked by parasites, then try Unofficial Tutorials: First Contact from Sigils to Evocation Collection.
For reference:
The rules are here - please read them.
The posting guidelines are here in the FAQ
The Terms of Service are here