Can I get my visa to visit my boyfriend in the states

My biggest concern is the reasoning for your IV denial at the embassy? I presumed that their visa was a non-immigrant visa and you are over age 21....

When will i paid the visa fees before interview or after interview in the us empassy

You may pay for IV fees at the National Visa Center or you will not have an appointment with the consulate.

This appears to be a civil matter rather than criminal and generally police will not be involved. May be you best course of action is to file for...

E2 Visa

Frankly i don't see enough information for me to respond. However, i suggest that you consult with an immigration attorney.

H1b extension filed in Jan 2017 but my project may finish by end of March 2017.

I suggest that you consult with the company lawyer as soon as possible to be sure you are eligible to transfer..

Can a us citizen file immigrant petition for mom while on US visit??

Ok, if your mom just arrived in US, be careful if you are filing right away as she could be subject to presumption of dual intent and her AOS can...

Can I work on OPT-EAD when I-485/I-765/I-131 is pending?

Just wait a bit longer. Your EAD is on its way, normally within 90 days after filing you should be receiving your card.

Can I work as freelancer with F1 Visa ?

remember when it comes to proving if you have violated the terms of your non-immigrant visa, it is your burden to show that you have not violated...

Your fact specific is lacking and it is difficult to understand your specific situation. Consult with a lawyer.

I751 worried about something

Your question is not fact specific and for that you need to consult with an attorney near you. You also need to know that the burden of showing...