Phobia of men

Basically I’m 19 and It’s like I have a phobia of men I find it very hard to talk to men and I can’t look them in the eye if I’m talking to them I will have to look in a different direction and face away from them. Also if I’m walking and I see like a man walking towards me I will just walk in a shop or someone’s garden until they have passed by if I’m shopping if it’s a guy serving I will just put everything back and leave. I literally go to extreme lengths to avoid men is this normal? I have a friend who’s a guy and we’ve been friends for years and we decided to have sex together because I’ve never even kissed a guy before so I thought if I just got sex over and done with it might help me get over my fear of men however when we tried I got really scared and I couldn’t breath and was shaking and he said he could literally heart my heart beating? I’m almost 20 and I csnt even speak to men let alone do anything with them and I fear I’ll be forever alone because of it. What can I do??