Hi, it's my first post! So, it's a long one, but I'll try keeping it short. Never told anyone this in my life, so this will be my first time 'getting it out there'. Also, not allowed to post in the relationship section (as I haven't made my 20 post's) so feel free to move the post!
I had not had sex until I was 21. Basically, I had my first sexual activity (head) when I was quite young (14) and after that, and for some stupid psychological reason (which is for another post) I almost avoided sex until now.
About 4 months ago, it finally happened. I was away on a trip, and I hardly knew her. I didn't even know her name. Right now, she is my girlfriend, and I've got new problems!
A bit of background with the relationship- basically since we first 'met', we have been seeing a lot of each other. After 2 months, we had the 'making it official' talk, after she kissed another guy, and I told her I wasn't cool with it. It was really tough, and I was almost going to end it there. But instead we've kept going. After about 2.5 months, she said she loves me. I said nothing for about 5 minutes, then 'I think I might too'.... I KNOW! She's said it a couple of times, and I haven't ever said it back...
I care about her a lot, but I still am struggling with trust/the whole situation. I almost get depressed when we are apart. The fact I had sex with her so 'easily' downed my confidence. Then she told me how many guys she had slept with (18) and that's affected me even more.
Basically, nobody knows she was the first girl I slept with. Especially not her. I somehow have managed (after 4 months) to maintain a false cover of having slept with my 'fair share' of women (I said

.
Now, there are 2 big issues- firstly, I can't see any point in telling here the truth about me never being laid before. What's the point?
I'm having so much trouble trusting her- maybe it's because she's been with so many guys (18- too many?) Maybe it's because she kissed another guys after 1.5 months of us seeing each other? To her credit, I haven't noticed anything sus, and we sleep together a lot (3 times a day, 5 times a week usually), but I'm still finding it so hard to trust her
Would I be reasonably in suggesting one of the only reasons I'm into her so much, being because she was my first lay?
Be kind, I'm a total newbie to this place!